When attempting to delete a calendar I am receiving a message saying that it has failed to delete the calendar. This only appears to be happening with pre-existing calendars though as I have been able to delete freshly created calendars.

I have tried changing the settings of the Calendars (Which has lead to me currently having two copies of the same calendar hoping that I could delete the other calendar instead), I have cleared my cache and cookies, and I have attempted to do so on Firefox and Opera as well as chrome all of which are experiencing the issue.

The calendar I originally attempted to delete is not referenced anywhere in any of my articles nor is it a part of any existing timelines, though it was connected to a version of my timeline I deleted yesterday.

Steps to Reproduce

1. Select Expand Advanced Tools in the Tool sidebar
2. Select [world] Calendars
3. Click the … on the Calendar to be deleted
4. Click Delete
5. Confirm Deletion
6. Receive error message

Operating System

Browser