CORRECTION: I solved my problem by deleting the CONTENT of this file: ~/.local/share/evolution/calendar/system/calendar.ics
And also this file: ~/.evolution/calendar/local/system/calendar.ics
I left the (now empty) files there after deleting their contents, in case something was expecting them.
CORRECTION: I solved my problem by deleting the CONTENT of this file: ~/.local/ share/evolution /calendar/ system/ calendar. ics
And also this file: ~/.evolution/ calendar/ local/system/ calendar. ics
I left the (now empty) files there after deleting their contents, in case something was expecting them.