Help! Fatal error lauching Libreoffice

Hi,
from some days we are experimenting a "fatal error" every time a user tries
to launch  a program of Libreoffice suite on tjener.
The error occurs for every user. Everything works fine on clients.
This is the message:

Extension Manager: exception in synchronize
./desktop/source/-deployment/manager/dp-extensionmanager.cxx:1270

I tried to uninstall and reinstall with:
apt purge libreoffice
apt install libreoffice
but with no result.

Any idea??
Thanks for help!
Lorenzo