Using a TikZ matrix in a TikZPoster does not work.
Here is an MWE:
\documentclass{tikzposter}
\usetikzlibrary{matrix}
\begin{document}
\block{Some title}{
\begin{tikzpicture}
\matrix [matrix of nodes] {
A & B \\
};
\end{tikzpicture}
}
\end{document}
It gives the error
! Undefined control sequence.
<argument> \pgf@matrix@last@nextcell@options
Any suggestions for a workaround?