# tcolorbox generates errors when included

I'm having a small problem since my computer was reinstalled by the IT of my office. The package tcolorbox which used to work can't be included anymore.

MWE :

\documentclass[12pt]{article}

\usepackage[french]{babel}
\usepackage[T1]{fontenc}

\usepackage{tcolorbox}

\begin{document}

\end{document}


This code generates multiple errors, first of which is Undefined control sequence : \ExplSyntaxOn . Does someone have an idea what's wrong ?

I'm compiling using XeLaTex, on texmaker 5.1.2 on windows 10. Latex and PDFlatex generate the same error.

• Show the log-file, but my guess that have an old latex and a new tcolorbox. Sep 15 at 10:19
• Sorry for asking, but I can't attach a file to a post can I ? How do I post the whole logfile ? Sep 15 at 13:39