In a moderncv document, I get "Undefined control sequence" when I use longfbox:
\documentclass{moderncv}
\usepackage{longfbox}
\name{First}{Last}
\begin{document}
Lorem
\end{document}
The output seems to be generated OK, but LaTeX throws an error about @makefntext:
/usr/share/texlive/texmf-dist/tex/latex/mdwtools/footnote.sty:170: Undefined control sequence.
l.170 \expandafter\@tempa\@makefntext
\@@\@@@
I already checked Error with longfbox package and Using footnotes with moderncv class in LaTeX, but those seems to be different issues.