ytableau package incompatible

[mbertucci47]

The ytableau package errors with the math tagging code and otherwise produces empty tags.

\DocumentMetadata
  {
    lang=en-US,
    pdfversion=2.0,
    pdfstandard=ua-2,
    testphase={phase-III,title,math,table,firstaid}
  }
\documentclass{article}
\usepackage{ytableau}

\title{ytableau tagging test}

\begin{document}

\begin{ytableau}
a & d & f \\
b & e & g \\
c
\end{ytableau}

\end{document}

errors with

! Argument of \__math_grab_dollar:w has an extra }.