Error message when viewing calendar event

Good day forum,

We're setting up a new calendar, and this will be our first time using it to this extent. After adding events, on the event page I'm seeing the following error: 

I have checked permissions on all possible levels, both the Group and Calendar levels.  I'm seeing this for both anonymous and registered users.

The group where the calendar lives is joinless, and the event also doesn't require registration (we're using Teams for registration - this is more for the visual). 

I cannot for the life of me find where this error is coming from. I've also checked all the widgets on the page - they were both reverted to default and the only custom edits are the resources (we have multiple languages). 

I'm using version 13.0.2.33658  (there is a bug blocking us from upgrading)

We did find this bug in the Release notes: 

  • TE-19274 - Fixed issue with creating calendar events error due to no event registration being present   

But it doesn't feel like THIS particular issue, but I could be wrong. I appreciate any insights :) 

Thanks so much! 



added bug item
[edited by: Marisa at 7:28 PM (GMT 0) on Tue, Aug 18 2026]