Issue Summary

I see the following error when trying to add a Nextcloud CalDAV url to my cal.com account. Note: I already added another CalDAV Nextcloud calendar and everything went smoothly.

Steps to Reproduce

1. Click on “add CalDAV” calendar in https://app.cal.com/apps/installed/calendar?hl=caldav-calendar
2. Trying to add two different URLs: https://nuvola.scambi.org/apps/calendar/p/zogAXYXHjYHwksDp (public calendar link) and https://nuvola.scambi.org/remote.php/dav/principals/users/tommi/
3. The error I shared pops up

Related to #3457

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