Being stuck on second tab in Edit Scheduled Events because of ServerError
Steps to reproduce
When using the Edit Scheduled Events modal the conflict checking can fail with Server Error 500 (Problem accessing /admin-ng/event/bulk/conflicts. Reason:
org.apache.cxf.interceptor.Fault: Could not initialize class java.time.zone.ZoneRulesProvider) which results in being stuck in the second tab with no clue as to what went wrong.