1

CalendarApp.ProviderBase.Exceptions.AccountRequestException: Not Found (404)

Error on W10 Pro (21H1)

CalendarApp.ProviderBase.Exceptions.AccountRequestException: Not Found (404)

Occurs every time an event is added or manual synchronisation is selected.

Using Google calendar, also accessed on an Android phone.  Synchronisation appears to be taking place satisfactorily.