mathtools gives error in lwarp 0.919

[franburstall]

Simply adding \usepackage{mathtools} to a LaTeX document causes lwarpto error thusly:

! Undefined control sequence.
<write> ...pace and related,\MessageBreak and \cs 
                                                  {MakeAboxedCommand}\@gobbl...
l.6 \begin{document}
                    
? 

My TeX installation is texlive-2025.

Here is a minimum working example:

\documentclass{article}

\usepackage[mathjax]{lwarp}
\usepackage{mathtools}

\begin{document}
Hello world
\end{document}

[bdtc]

Found and fixed the next release, thanks.

In the meantime, you could do something like: \newcommand*{\cs}[1]{#1} before loading mathtools.