尝试编译一个旧的、曾经有效的文档，但出现了错误。从文档中获取了一个示例，但错误出现了。我使用 TexLive2023，我会定期更新它
\documentclass[]{article}
\usepackage{spreadtab}
\begin{document}
\begin{spreadtab}{{tabular}{ccccc}}
1 & & & & \\
a1 & a1 & & & \\
a2 & a2+b2 & b2 & & \\
a3 & a3+b3 & b3+c3 & c3 & \\
a2 & a4+b4 & b4+c4 & c4+d4 & d4
\end{spreadtab}
\end{document}
New spreadtab: \begin{tabular}{ccccc}
* reading tab:
! Undefined control sequence.
<argument> \ST@after@ref@found
l.13 \end{spreadtab}
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.