Could not add calendar time zone: Invalid object when using specific time zones
Since a few days, I'm unable to add new meetings/appointments to the calendar when using my default timezone (Europe/Brussels). The error message is "Could not add calendar time zone: Invalid object" and occurs for an EWS calendar and a WebDAV (nextcloud) calendar. It works for other timezones, but I could not find a pattern (some from Africa work, some not).