Calendar does not save updated URL

Hi,

I noticed that when attempting to update a calendar’s url it will throw an error saying that the server cannot be reached. Upon checking, the new URL has not been saved because the old one is still listed.

In addition, when adding a new calendar, I get an error message about a foreach loop not working.

The calendar is in use by other clients (Thunderbird, Outlook, Android Mobile phone calendar app, etc.) for read and write.

I’m running Version 16.0.34.3
Does anyone have a clue?

Alrighty, I had some time to tinker.
Here’s what does NOT resolve the behaviour:
Manually reinstalling the calendar module as well as the Core module.
In addition, it appears that the problem stems from re-occuring events in the calendar, such as every weekday, or once a month. I don’t think it’s a malconfiguration as, well CALDAV runs a standard and no other calendar of mine throws an error.

It turns out that deleting the calendar and recreating it with daily events instead of special rules based on weekdays fixes the behaviour.