Hi Rene,
dated libreoffice up this morning, but no success. I deletd ~/.config/libreoffice and got this error message:
user@protheus7:~$ libreoffice error xsltParseStylesheetFile : cannot parse I/O warning : failed to load external entity "" error xsltParseStylesheetFile : cannot parse user@protheus7:~$
Hope, this helps.
Best
Hans