\setmathfont  \tl_case:Nnn error

With fontspec [2015/07/22 v2.4d Font selection for XeLaTeX and LuaLaTeX] from the current MacTeX updates I get an error when setting the math font.
Minimal example:
\documentclass{scrartcl}
\usepackage{fontspec}%
\usepackage{unicode-math}%
\setmathfont{TeX Gyre Pagella Math}
\begin{document}
\end{document}

Error message
./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

./minimal.tex:4: Missing $ inserted.
<inserted text>
$

Complete log
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Package: ltxcmds 2011/11/09 v1.22 LaTeX kernel commands for general use (HO)
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\Gread@gobject=\count287
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. LaTeX info: "xparse/define-command"
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. Defining command \__fontspec_post_arg:w with sig. 'mmO{}' on line 45.
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. Defining command \addfontfeatures with sig. 'm' on line 214.
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. Defining command \newfontfeature with sig. 'mm' on line 225.
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. Defining command \newfontlanguage with sig. 'mm' on line 305.
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. Defining command \DeclareFontsExtensions with sig. 'm' on line 325.
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\l__fontspec_tmp_int=\count288
LaTeX Info: Redefining \itshape on input line 2154.
LaTeX Info: Redefining \slshape on input line 2159.
LaTeX Info: Redefining \scshape on input line 2164.
LaTeX Info: Redefining \upshape on input line 2169.

(/usr/local/texlive/2015/texmf-dist/tex/latex/fontspec/fontspec.cfg)))
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Package: unicode-math 2014/06/30 v0.7f Unicode maths in XeLaTeX and LuaLaTeX

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Package: ifxetex 2010/09/12 v0.6 Provides ifxetex conditional
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Package: l3keys2e 2015/07/14 v5662 LaTeX2e option processing using LaTeX3 keys
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Package: catchfile 2011/03/01 v1.6 Catch the contents of a file (HO)

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Package: etexcmds 2011/02/16 v1.5 Avoid name clashes with e-TeX commands (HO)
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Package: fix-cm 2015/01/14 v1.1t fixes to LaTeX

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File: ts1enc.def 2001/06/05 v3.0e (jk/car/fm) Standard LaTeX file
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Package: filehook 2011/10/12 v0.5d Hooks for input files

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Package: filehook-scrlfile 2011/01/03 v0.1 filehook patch for scrlfile package
Package filehook Info: Package 'scrlfile' detected and compensated for on input
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Variant \tl_put_right:cx already defined; not changing it on line 67
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. Defining command \unimathsetup with sig. 'm' on line 156.
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(/usr/local/texlive/2015/texmf-dist/tex/latex/unicode-math/unicode-math-luatex.
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y
Package: lualatex-math 2014/08/18 v1.4 Patches for mathematics typesetting with
LuaLaTeX
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Package: etoolbox 2015/05/04 v2.2 e-TeX tools for LaTeX (JAW)
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Lua module: lualatex-math 2013/08/03 1.3 Patches for mathematics typesetting wit
h LuaLaTeX
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. lualatex-math info: "patch-macro"
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. I'm going to patch macro \new@mathgroup.
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\g_um_primekern_muskip=\muskip16
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\g__file_internal_ior=\read1
luaotfload | cache : Lookup cache loaded from /Users/jkuepper/Library/texlive/20
15/texmf-var/luatex-cache/generic/names/luaotfload-lookup-cache.luc.
luaotfload | load : Lookup/name: "TeX Gyre Pagella Math" -> "texgyrepagella-math
.otf"(compiling luc: /usr/local/texlive/2015/texmf-var/luatex-cache/generic/font
s/otf/texgyrepagella-math.luc)(load luc: /Users/jkuepper/Library/texlive/2015/te
xmf-var/luatex-cache/generic/fonts/otf/texgyrepagella-math.luc)
luaotfload | load : Lookup/name: "TeX Gyre Pagella Math" -> "texgyrepagella-math
.otf"
\g__fontspec_family_TeXGyrePagellaMath_int=\count292
luaotfload | load : Lookup/name: "TeX Gyre Pagella Math" -> "texgyrepagella-math
.otf"
luaotfload | load : Lookup/name: "TeX Gyre Pagella Math" -> "texgyrepagella-math
.otf"
.................................................
. fontspec info: "no-font-shape"
.
. Could not resolve font TeX Gyre Pagella Math/B (it probably doesn't exist).
.................................................
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
luaotfload | aux : font no 21 (TeXGyrePagellaMath-Regular) does not define featu
re smcp for script math with language dflt
luaotfload | aux : no font with id 21
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
.................................................
. fontspec info: "defining-font"
.
. Font family 'TeXGyrePagellaMath(0)' created for font 'TeX Gyre Pagella Math'
. with options
. [Renderer=Basic,BoldItalicFont={},ItalicFont={},Script=Math,SizeFeatures={{Siz
e=10-},{Size=7-10,Font=TeX
. Gyre Pagella Math,Style=MathScript},{Size=-7,Font=TeX Gyre Pagella
. Math,Style=MathScriptScript}}].
.
. This font family consists of the following shapes:
.
. * 'normal' with NFSS spec.:
.
. <10->"TeXGyrePagellaMath:mode=base;script=math;language=DFLT;"<7-10>"TeXGyrePa
gellaMath:mode=base;script=math;language=DFLT;+ssty=0;"<-7>"TeXGyrePagellaMath:m
ode=base;script=math;language=DFLT;+ssty=1;"
.
. * 'small caps' with NFSS spec.:
.
. and font adjustment code:
.
.................................................
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
luaotfload | load : Lookup/name: "TeX Gyre Pagella Math" -> "texgyrepagella-math
.otf"
LaTeX Font Info:    Encoding `OT1' has changed to `EU2' for symbol font
(Font)              `operators' in the math version `normal' on input line 4.
LaTeX Font Info:    Overwriting symbol font `operators' in version `normal'
(Font)                  OT1/cmr/m/n --> EU2/TeXGyrePagellaMath(0)/m/n on input l
ine 4.
LaTeX Font Info:    Encoding `OT1' has changed to `EU2' for symbol font
(Font)              `operators' in the math version `bold' on input line 4.
LaTeX Font Info:    Overwriting symbol font `operators' in version `bold'
(Font)                  OT1/cmr/bx/n --> EU2/TeXGyrePagellaMath(0)/bx/n on input
 line 4.
luaotfload | load : Lookup/name: "TeX Gyre Pagella Math" -> "texgyrepagella-math
.otf"
luaotfload | load : Lookup/name: "TeX Gyre Pagella Math" -> "texgyrepagella-math
.otf"
luaotfload | load : Lookup/name: "TeX Gyre Pagella Math" -> "texgyrepagella-math
.otf"
luaotfload | load : Lookup/name: "TeX Gyre Pagella Math" -> "texgyrepagella-math
.otf"
.................................................
. fontspec info: "no-font-shape"
.
. Could not resolve font TeX Gyre Pagella Math/B (it probably doesn't exist).
.................................................
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
luaotfload | aux : font no 21 (TeXGyrePagellaMath-Regular) does not define featu
re smcp for script math with language dflt
luaotfload | aux : no font with id 21
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
.................................................
. fontspec info: "defining-font"
.
. Font family 'TeXGyrePagellaMath(1)' created for font 'TeX Gyre Pagella Math'
. with options
. [Renderer=Basic,BoldItalicFont={},ItalicFont={},Script=Math,SizeFeatures={{Siz
e=10-},{Size=7-10,Font=TeX
. Gyre Pagella Math,Style=MathScript},{Size=-7,Font=TeX Gyre Pagella
. Math,Style=MathScriptScript}},Scale=1.00001,FontAdjustment={\fontdimen
. 8\font =471859.2sp\relax \fontdimen 9\font =307363.84sp\relax \fontdimen
. 10\font =307363.84sp\relax \fontdimen 11\font =436469.76sp\relax \fontdimen
. 12\font =203816.96sp\relax \fontdimen 13\font =231997.44sp\relax \fontdimen
. 14\font =231997.44sp\relax \fontdimen 15\font =193986.56sp\relax \fontdimen
. 16\font =152043.52sp\relax \fontdimen 17\font =0sp\relax \fontdimen 18\font
. =152043.52sp\relax \fontdimen 19\font =76021.76sp\relax \fontdimen 20\font
. =0pt\relax \fontdimen 21\font =0pt\relax \fontdimen 22\font =163840sp\relax
. }].
.
. This font family consists of the following shapes:
.
. * 'normal' with NFSS spec.:
.
. <10->s*[1.00001]"TeXGyrePagellaMath:mode=base;script=math;language=DFLT;"<7-10
>s*[1.00001]"TeXGyrePagellaMath:mode=base;script=math;language=DFLT;+ssty=0;"<-7
>s*[1.00001]"TeXGyrePagellaMath:mode=base;script=math;language=DFLT;+ssty=1;"
.
. * 'small caps' with NFSS spec.:
.
. and font adjustment code:
. \fontdimen 8\font =471859.2sp\relax \fontdimen 9\font =307363.84sp\relax
. \fontdimen 10\font =307363.84sp\relax \fontdimen 11\font =436469.76sp\relax
. \fontdimen 12\font =203816.96sp\relax \fontdimen 13\font =231997.44sp\relax
. \fontdimen 14\font =231997.44sp\relax \fontdimen 15\font =193986.56sp\relax
. \fontdimen 16\font =152043.52sp\relax \fontdimen 17\font =0sp\relax
. \fontdimen 18\font =152043.52sp\relax \fontdimen 19\font =76021.76sp\relax
. \fontdimen 20\font =0pt\relax \fontdimen 21\font =0pt\relax \fontdimen
. 22\font =163840sp\relax
.................................................
LaTeX Font Info:    Encoding `OMS' has changed to `EU2' for symbol font
(Font)              `symbols' in the math version `normal' on input line 4.
LaTeX Font Info:    Overwriting symbol font `symbols' in version `normal'
(Font)                  OMS/cmsy/m/n --> EU2/TeXGyrePagellaMath(1)/m/n on input
line 4.
LaTeX Font Info:    Encoding `OMS' has changed to `EU2' for symbol font
(Font)              `symbols' in the math version `bold' on input line 4.
LaTeX Font Info:    Overwriting symbol font `symbols' in version `bold'
(Font)                  OMS/cmsy/b/n --> EU2/TeXGyrePagellaMath(1)/bx/n on input
 line 4.
luaotfload | load : Lookup/name: "TeX Gyre Pagella Math" -> "texgyrepagella-math
.otf"
luaotfload | load : Lookup/name: "TeX Gyre Pagella Math" -> "texgyrepagella-math
.otf"
luaotfload | load : Lookup/name: "TeX Gyre Pagella Math" -> "texgyrepagella-math
.otf"
luaotfload | load : Lookup/name: "TeX Gyre Pagella Math" -> "texgyrepagella-math
.otf"
.................................................
. fontspec info: "no-font-shape"
.
. Could not resolve font TeX Gyre Pagella Math/B (it probably doesn't exist).
.................................................
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
luaotfload | aux : font no 21 (TeXGyrePagellaMath-Regular) does not define featu
re smcp for script math with language dflt
luaotfload | aux : no font with id 21
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
.................................................
. fontspec info: "defining-font"
.
. Font family 'TeXGyrePagellaMath(2)' created for font 'TeX Gyre Pagella Math'
. with options
. [Renderer=Basic,BoldItalicFont={},ItalicFont={},Script=Math,SizeFeatures={{Siz
e=10-},{Size=7-10,Font=TeX
. Gyre Pagella Math,Style=MathScript},{Size=-7,Font=TeX Gyre Pagella
. Math,Style=MathScriptScript}},Scale=0.99999,FontAdjustment={\fontdimen
. 8\font =39321.6sp\relax \fontdimen 9\font =78643.2sp\relax \fontdimen
. 10\font =78643.2sp\relax \fontdimen 11\font =78643.2sp\relax \fontdimen
. 12\font =306708.48sp\relax \fontdimen 13\font =0pt\relax }].
.
. This font family consists of the following shapes:
.
. * 'normal' with NFSS spec.:
.
. <10->s*[0.99999]"TeXGyrePagellaMath:mode=base;script=math;language=DFLT;"<7-10
>s*[0.99999]"TeXGyrePagellaMath:mode=base;script=math;language=DFLT;+ssty=0;"<-7
>s*[0.99999]"TeXGyrePagellaMath:mode=base;script=math;language=DFLT;+ssty=1;"
.
. * 'small caps' with NFSS spec.:
.
. and font adjustment code:
. \fontdimen 8\font =39321.6sp\relax \fontdimen 9\font =78643.2sp\relax
. \fontdimen 10\font =78643.2sp\relax \fontdimen 11\font =78643.2sp\relax
. \fontdimen 12\font =306708.48sp\relax \fontdimen 13\font =0pt\relax
.................................................
LaTeX Font Info:    Encoding `OMX' has changed to `EU2' for symbol font
(Font)              `largesymbols' in the math version `normal' on input line 4.

LaTeX Font Info:    Overwriting symbol font `largesymbols' in version `normal'
(Font)                  OMX/cmex/m/n --> EU2/TeXGyrePagellaMath(2)/m/n on input
line 4.
LaTeX Font Info:    Encoding `OMX' has changed to `EU2' for symbol font
(Font)              `largesymbols' in the math version `bold' on input line 4.
LaTeX Font Info:    Overwriting symbol font `largesymbols' in version `bold'
(Font)                  OMX/cmex/m/n --> EU2/TeXGyrePagellaMath(2)/bx/n on input
 line 4.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing $ inserted.
<inserted text>
$
l.4 \setmathfont{TeX Gyre Pagella Math}

I've inserted a begin-math/end-math symbol since I think
you left one out. Proceed, with fingers crossed.

./minimal.tex:4: LaTeX Error: Missing \begin{document}.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...

l.4 \setmathfont{TeX Gyre Pagella Math}

You're in trouble here.  Try typing  <return>  to proceed.
If that doesn't work, type  X <return>  to quit.

luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
LaTeX Font Info:    Font shape `EU2/TeXGyrePagellaMath(1)/m/n' will be
(Font)              scaled to size 10.00015pt on input line 4.
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
LaTeX Font Info:    Font shape `EU2/TeXGyrePagellaMath(1)/m/n' will be
(Font)              scaled to size 7.40016pt on input line 4.
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
LaTeX Font Info:    Font shape `EU2/TeXGyrePagellaMath(1)/m/n' will be
(Font)              scaled to size 5.5001pt on input line 4.
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
LaTeX Font Info:    Font shape `EU2/TeXGyrePagellaMath(2)/m/n' will be
(Font)              scaled to size 9.99985pt on input line 4.
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
LaTeX Font Info:    Font shape `EU2/TeXGyrePagellaMath(2)/m/n' will be
(Font)              scaled to size 7.39993pt on input line 4.
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
LaTeX Font Info:    Font shape `EU2/TeXGyrePagellaMath(2)/m/n' will be
(Font)              scaled to size 5.49994pt on input line 4.
luaotfload | load : Lookup/name: "TeXGyrePagellaMath" -> "texgyrepagella-math.ot
f"
./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing control sequence inserted.
<inserted text>
\inaccessible
l.4 \setmathfont{TeX Gyre Pagella Math}

Please don't say `\def cs{...}', say `\def\cs{...}'.
I've inserted an inaccessible control sequence so that your
definition will be completed without mixing me up too badly.
You can recover graciously from this error, if you're
careful; see exercise 27.2 in The TeXbook.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing control sequence inserted.
<inserted text>
\inaccessible
l.4 \setmathfont{TeX Gyre Pagella Math}

Please don't say `\def cs{...}', say `\def\cs{...}'.
I've inserted an inaccessible control sequence so that your
definition will be completed without mixing me up too badly.
You can recover graciously from this error, if you're
careful; see exercise 27.2 in The TeXbook.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
<argument> \
 cs_gset_protected_nopar:Npx\{\exp_not:c{\cs_to_str:N\backslash_sym}}
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
<argument> \cs_gset_protected_nopar:
                         Npx\{\exp_not:c{\cs_to_str:N\backslash_sym}}
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
<argument> \cs_gset_protected_nopar:Npx\
                             {\exp_not:c{\cs_to_str:N\backslash_sym}}
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
<argument> \cs_gset_protected_nopar:Npx\{\
                               exp_not:c{\cs_to_str:N\backslash_sym}}
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
<argument> \cs_gset_protected_nopar:Npx\{\exp_not:
                                       c{\cs_to_str:N\backslash_sym}}
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
<argument> \cs_gset_protected_nopar:Npx\{\exp_not:c{\
                                          cs_to_str:N\backslash_sym}}
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
<argument> ...set_protected_nopar:Npx\{\exp_not:c{\cs_to_str:
                                                  N\backslash_sym}}
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
<argument> ...t_protected_nopar:Npx\{\exp_not:c{\cs_to_str:N\
                                                  backslash_sym}}
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Argument of \__tl_rescan:w has an extra }.
<inserted text>
\par
l.4 \setmathfont{TeX Gyre Pagella Math}

I've run across a `}' that doesn't seem to match anything.
For example, `\def\a#1{...}' and `\a}' would produce
this error. If you simply proceed now, the `\par' that
I've just inserted will cause me to report a runaway
argument that might be the root of the problem. But if
your `}' was spurious, just type `2' and it will go away.

Runaway argument?
\prg_do_nothing: \cs_gset_protected_nopar:Npx {{\exp_not:c {\cs_to_str:N \ETC.
./minimal.tex:4: Paragraph ended before \__tl_rescan:w was complete.
<to be read again>
\par
l.4 \setmathfont{TeX Gyre Pagella Math}

I suspect you've forgotten a `}', causing me to apply this
control sequence to too much text. How can we recover?
My plan is to forget the whole thing and hope for the best.

./minimal.tex:4: Undefined control sequence.
<everyeof> :
 :\exp_not:N
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
<recently read> :

l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Extra }, or forgotten \endgroup.
<recently read> }

l.4 \setmathfont{TeX Gyre Pagella Math}

I've deleted a group-closing symbol because it seems to be
spurious, as in `$x}$'. But perhaps the } is legitimate and
you forgot something else, as in `\hbox{$x}'. In such cases
the way to recover is to insert both the forgotten and the
deleted material, e.g., by typing `I$}'.

./minimal.tex:4: Extra }, or forgotten \endgroup.
\use:x ...s_set_nopar:Npx \l__exp_internal_tl {#1}
                                                  \l__exp_internal_tl
l.4 \setmathfont{TeX Gyre Pagella Math}

I've deleted a group-closing symbol because it seems to be
spurious, as in `$x}$'. But perhaps the } is legitimate and
you forgot something else, as in `\hbox{$x}'. In such cases
the way to recover is to insert both the forgotten and the
deleted material, e.g., by typing `I$}'.

./minimal.tex:4: Missing $ inserted.
<inserted text>
$
l.4 \setmathfont{TeX Gyre Pagella Math}

I've inserted a begin-math/end-math symbol since I think
you left one out. Proceed, with fingers crossed.

./minimal.tex:4: Missing \endgroup inserted.
<inserted text>
\endgroup
l.4 \setmathfont{TeX Gyre Pagella Math}

I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.

./minimal.tex:4: Missing } inserted.
<inserted text>
}
l.4 \setmathfont{TeX Gyre Pagella Math}

I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.

./minimal.tex:4: Missing } inserted.
<inserted text>
}
l.4 \setmathfont{TeX Gyre Pagella Math}

I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.

./minimal.tex:4: Extra \endgroup.
\um_set_big_operator:nnn ...:N #2_sym}\group_end:
                                                  \um_set_mathchar:cNnn {\cs...
l.4 \setmathfont{TeX Gyre Pagella Math}

Things are pretty mixed up, but I think the worst is over.

./minimal.tex:4: Too many }'s.
\um_set_mathsymbol:nNNn ...rator:nnn {#1}{#2}{#4}}
                                                  \mathopen {\um_set_math_op...
l.4 \setmathfont{TeX Gyre Pagella Math}

You've closed more groups than you opened.
Such booboos are generally harmless, so keep going.

./minimal.tex:4: Missing $ inserted.
<inserted text>
$
l.4 \setmathfont{TeX Gyre Pagella Math}

I've inserted a begin-math/end-math symbol since I think
you left one out. Proceed, with fingers crossed.

./minimal.tex:4: LaTeX Error: Missing \begin{document}.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...

l.4 \setmathfont{TeX Gyre Pagella Math}

You're in trouble here.  Try typing  <return>  to proceed.
If that doesn't work, type  X <return>  to quit.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Extra }, or forgotten $.
\um_set_mathsymbol:nNNn ...1}{#4}{##1}}\limits }}}
                                                  {\um_set_mathcode:nnn {#4}...
l.4 \setmathfont{TeX Gyre Pagella Math}

I've deleted a group-closing symbol because it seems to be
spurious, as in `$x}$'. But perhaps the } is legitimate and
you forgot something else, as in `\hbox{$x}'. In such cases
the way to recover is to insert both the forgotten and the
deleted material, e.g., by typing `I$}'.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing control sequence inserted.
<inserted text>
\inaccessible
l.4 \setmathfont{TeX Gyre Pagella Math}

Please don't say `\def cs{...}', say `\def\cs{...}'.
I've inserted an inaccessible control sequence so that your
definition will be completed without mixing me up too badly.
You can recover graciously from this error, if you're
careful; see exercise 27.2 in The TeXbook.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

Runaway argument?
\prg_do_nothing: \cs_gset_protected_nopar:Npx }{\exp_not:c {\cs_to_str:N \ETC.
./minimal.tex:4: File ended while scanning use of \__tl_rescan:w.
<inserted text>
\par
l.4 \setmathfont{TeX Gyre Pagella Math}

I suspect you have forgotten a `}', causing me
to read past where you wanted me to stop.
I'll try to recover; but if the error is serious,
you'd better type `E' or `X' now and fix your file.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathover ->\
             mathover
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\mathunder ->\
              mathunder
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Undefined control sequence.
\um_set_mathsymbol:nNNn #1#2#3#4->\tl_case:Nnn
                                               #3{\mathop {\um_set_big_opera...
l.4 \setmathfont{TeX Gyre Pagella Math}

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Missing number, treated as zero.
<to be read again>
{
l.4 \setmathfont{TeX Gyre Pagella Math}

A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

./minimal.tex:4: Undefined control sequence.
\mathbotaccent ->\
                  mathbotaccent
l.4 \setmathfont{TeX Gyre Pagella Math}

(That makes 100 errors; please try again.)

Here is how much of LuaTeX's memory you used:
 20102 strings out of 494703
 100000,552014 words of node,token memory allocated
 13580 words of node memory still in use:
   226 hlist, 1 rule, 2 math, 16 glue, 73 kern, 5 penalty, 660 noad, 24 accent,
511 math_char, 173 sub_mlist, 744 glyph, 373 attribute, 59 glue_spec, 366 attrib
ute_list, 3 temp, 1 write, 2 local_par, 3 dir nodes
   avail lists: 1:30,2:9,3:271,4:250,6:2,7:1,10:4
 23480 multiletter control sequences out of 65536+600000
 34 fonts using 7999407 bytes
 62i,7n,60p,1210b,226s stack positions out of 5000i,500n,10000p,200000b,100000s
./minimal.tex:4:  ==> Fatal error occurred, no output PDF file produced!

No need to paste in the entire log file :). This is a unicode-math issue, and an update has been sent earlier today to fix the issue. Apologies for the inconvenience.

No need to paste in the entire log file

Sorry, this way you got a full report;-)  And, I couldn't figure out how to attach a file...