How to sync Nextcloud

[RoundAboutWEB]

I cannot synchronize a calendar from Nextcloud. Where is the error?
Link: https://nextcloud.roundaboutweb.info/index.php/apps/calendar/p/idK8E9GN2sd6ZxgA

[zrknlzr]

You'll have to add this as a public calendar subscription link. It would look like this for example: https://nextcloud.roundaboutweb.info/remote.php/dav/public-calendars/idK8E9GN2sd6ZxgA?export.

You can generate such a link when editing the calendar.