Cannot add e Account for synchronisation

I had Problems syncing Tasks, therefore i deleted the e Account in syncing and tried to add IT after a New Start. Now i cannot add my account

2021-07-20 22:35:24 333 [foundation.e.accountmanager.ui.setup.DavResourceFinder] Finding initial carddav service configuration
2021-07-20 22:35:24 333 [foundation.e.accountmanager.ui.setup.DavResourceFinder] No principal found at user-given URL, trying to discover
2021-07-20 22:35:24 333 [foundation.e.accountmanager.ui.setup.DavResourceFinder] Looking up SRV records for _carddavs._tcp.e.ecloud
2021-07-20 22:35:24 333 [foundation.e.accountmanager.ui.setup.DavResourceFinder] Didn’t find carddav service, trying at https://e.ecloud:443
2021-07-20 22:35:24 333 [foundation.e.accountmanager.ui.setup.DavResourceFinder] Trying to determine principal from initial context path=https://e.ecloud/.well-known/carddav

Regain your privacy! Adopt /e/ the unGoogled mobile OS and online servicesphone

That’s strange : your device try to use, but the /e/ cloud is at
Maybe you should try the “Use a specific server” button ?

I can now add the account to synchronisation, but still my personal calendar is gone and i cannot sync my calendar.

Could you please check in Calendar app settings that “Personal” is present is enabled (solid icon) :

Then you can try to disable-enable it (“Synchronize this calendar”), then use “Refresh” from the 3-dot menu.

If “Personal” is not in the list, then you may have a problem with your /e/ account settings.