我在 Overleaf 上有一个很长的 tex 文件，刚开始的时候，不知怎么的，编译失败了。我把它简化成了一个最小的工作示例
\documentclass{article}
%%%%%%%%%%%%%%%%%% Pre-Load Packages Order %%%%%%%%%%%%%%%%%%%
\usepackage[utf8]{inputenc}
\usepackage[margin=1in]{geometry}
\usepackage[mode=buildnew,subpreambles=true,group=false]{standalone} % For side loaded Tikz Figures
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\title{TBD}
\author{Me!}
\begin{document}
\maketitle
blah blah blah
\end{document}
我收到以下错误：
Extra }, or forgotten \endgroup.
l.555 }
%
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{$x}'. In such cases
the way to recover is to insert both the forgotten and the
deleted material, e.g., by typing `I$}'.
但是，如果我删除选项“subpreambles=true”，错误就会消失。这是为什么呢？
答案1
如果没有更多日志中的上下文，调试起来会很困难，但显示的行是第 555 行，standalone.sty其中
\begingroup
\setbox\@tempboxa\hbox{%
\makeatother
\InputIfFileExists{\jobname.sta}{}{\PackageInfo{standalone}{STA file not found!}{}{}}%
}%
\endgroup
所以我猜测之前的运行写入了一个错误的.sta文件。
您可以通过 overleaf 菜单清除所有此类生成的文件
“从头开始重新编译”
或者
“清除缓存文件”
