[Google Calendar] ##### Nullable object must have a value

Hi everyone. I found eM Client stable. No crash so far but the Calendar does not show all enabled calendars properly and the report window says:
[Google Calendar] Items loading into folder ‘vaclav.hor@gmail.com/Kalendář’ due to reason: Nullable object must have a value.

Did anyone face such a problem and solve it successfully?

Thanks for responses and stay healthy!