Can not use the Termbase

Last week I reinstalled my notebook and also trados studio 2021.
As of this moment the terbases doesn't work.
I can neither open it nor create a new one.
The error message at opening the existing TB: "General error occurred Multi Term kann das Multimedia-Objekt nicht abrufen."
The error message at creating a new one: "MultiTerm kann die Termbank nicht erstellen. Kein zulässiger Dateiname."
  (The file name is quite simple: "Recht")
I tried to deinstall/install several time and to repair with Trados Freshstart, but it didn't help.
So I would highly appreciate kind support.
emoji