I am interested in doing something similar to the situation outlined in Sub-matrices within a matrix, but am unable to achieve the given output on Overleaf. Taking the following MWE from the linked question above
\documentclass{article}
\usepackage{nicematrix}
\begin{document}
$\begin{pNiceMatrix}[margin]
c11 & c12 & c13 & c14 & c15 & c16 & c17 & c18 & c19 \
c12 & c22 & c23 & c24 & c25 & c26 & c27 & c28 & c29 \
c13 & c32 & c33 & c34 & c35 & c36 & c37 & c38 & c39 \
c14 & c42 & c44 & c45 & c46 & c47 & c48 & c48 & c49
\CodeAfter
\SubMatrix({1-7}{1-8})
\SubMatrix({2-5}{3-6})
\SubMatrix({4-1}{4-3})
\end{pNiceMatrix}$
\end{document}
I am able to obtain the desired outcome when I compile locally, but not on Overleaf, which returns that \SubMatrix is an undefined control sequence.
How is it I should rectify this issue and successfully use the nicematrix package on Overleaf? The documentation for the package notes its use in Overleaf, so I'm sure that it should work.
