Itemize within tabularx ==> missing item

I don’t understand why LuaLatex complains about missing items. I tried the following code. Using the mentioned packages enumitem and etoolbox didn’t help.

documentclass[a4paper,11pt]{article}
usepackage[shorthands=off,bidi=basic,english, ngerman]{babel}
usepackage{enumerate} 
usepackage{ltablex} % for tables with long lines & long tables (over >1 page)
usepackage{enumitem}
usepackage{etoolbox}

begin{document}
 begin{tabularx}{textwidth}{ X }
  begin{itemize}
    item 33
    item my first item
  end{itemize}
 end{tabularx}
end{document}

I tried to condense my sample until this error appears. Help would be appreciated to figure out what is wrong.