I couldn’t find a solution that works for me, so I started a new topic.
I am trying to subscribe to the calendar from my sports team, so I always am up to date with the matches etc.
I managed to subscribe to it in ecloud through the browser, however the subscribed calendars are not shown in the calendar app (Birthday calendar, personal calendar etc. is synced).
I read that using ICSx5 could be a workaround and I also tried to add a subscription through calendar > settings > add remote calendar (CalDAV). This forwards me to the App Store, where DAVx5 is disabled. Same goes for ICSx5.
DAVx5 and ICSx5 re both running on mine 4 Xiaomi and OnePlus devices and on a lot of other users.
DAVx5 is intergrated in eoS . It is used for /e/ account manager. So it can really don’t be an issue on eOS, sorry.
I think it has something to do with your cloud server DAV protocol.