在 Win 10 机器上全新安装MiKTeX22.3 便携版后，我无法再编译以下简单文档：
\documentclass[11pt]{article}
\usepackage[times]{fontsetup}
\usepackage{altsubsup}
\title{Brief Article}
\author{The Author}
\begin{document}
\maketitle
\section{First section}
Your text goes here.
\begin{equation}
E_{max} = \frac{C_[50] \cdot E_[max]}{V_[max] + \sqrt{C_[80]}}
\end{equation}
\subsection{A subsection}
More text.
\end{document}
Konsole 输出在这里：
This is XeTeX, Version 3.141592653-2.6-0.999994 (MiKTeX 22.3 Portable) (preloaded format=xelatex.fmt)
restricted \write18 enabled.
entering extended mode
(Namenlos-2.tex
LaTeX2e <2021-11-15> patch level 1
L3 programming layer <2022-02-24>
(D:\miktex-portable\texmfs\install\tex/latex/base\article.cls
Document Class: article 2021/10/04 v1.4n Standard LaTeX document class
(D:\miktex-portable\texmfs\install\tex/latex/base\size11.clo))
(D:\miktex-portable\texmfs\install\tex/latex/fontsetup\fontsetup.sty
fontsetup: Easy font setup by Antonis Tsolomitis
(D:\miktex-portable\texmfs\install\tex/latex/fontspec\fontspec.sty
(D:\miktex-portable\texmfs\install\tex/latex/l3packages/xparse\xparse.sty
(D:\miktex-portable\texmfs\install\tex/latex/l3kernel\expl3.sty
(D:\miktex-portable\texmfs\install\tex/latex/l3backend\l3backend-xetex.def ()
! Argument of \__sys_tmp:w has an extra }.
<inserted text>
\par
l.80 ...c__kernel_sys_dvipdfmx_version_int { 0 } }
?
Der Prozess wurde vom Benutzer abgebrochen
有人可以确认一下吗，或者我应该在 MiKTeX 错误跟踪器上开一张票？