Group calendars not accessible
The issue has been resolved
News from Apr 29, 2020
At the moment some users are missing access to their group calendars. There is not data loss, we only have to restore the group mappings.
Update (23:40): The group calendars are available again. Due to a reboot for an unrelated issue a race condition was triggered leading to the calendar daemon caching an incomplete list of groups which lead to all group memberships failing. The race condition has been fixed.