Missing \endgroup inserted. \end{document}" error

Dear all,

Just discovered this package. Using it on sharelatex goes fine, but I'm quick limitted by the complexity of my poster. I installed the tikzposter in TexLive (Mac user here) but even the CTAN tikzposter given template doesn't work. Among others, I have the recurrent "Missing \endgroup inserted. \end{document}" error. Could you please help figure out what I'm missing? Cheers Hugo