Hi @Wolfgang_Jekeli,
Click “Unauthorize” (bzw. im deutschen “Deautorisieren”) and you should be back authorised (I know, this might seem paradoxic).
The Roonlabs servers, think your core is authorized, but the device actually is not authorized as the authorization was not saved properly. So you need to click unauthorize button in order to authorize it again.
And this time (as you have performed the qpkg-update of RoonServer) it should be saved correctly and it won’t reoccur. 