x.log

This is XeTeX, Version 3.14159265-2.6-0.999991 (TeX Live 2019) (preloaded format=xelatex 2019.11.8)  6 AUG 2020 16:26
entering extended mode
 restricted \write18 enabled.
 %&-line parsing enabled.
**FscMathsFirst.
(/usr/local/texlive/2019/texmf-dist/tex/latex/tools/x.tex
LaTeX2e <2018-12-01>

! .
l.38   \batchmode \errmessage{}
                               \csname @@end\endcsname \end
This error message was generated by an \errmessage
command, so I can't give any explicit help.
Pretend that you're Hercule Poirot: Examine all clues,
and deduce the truth by order and method.

 ) 
Here is how much of TeX's memory you used:
 8 strings out of 492922
 186 string characters out of 6133407
 64272 words of memory out of 5000000
 4153 multiletter control sequences out of 15000+600000
 3640 words of font info for 14 fonts, out of 8000000 for 9000
 1348 hyphenation exceptions out of 8191
 4i,0n,1p,94b,8s stack positions out of 5000i,500n,10000p,200000b,80000s

No pages of output.