Adding a Nextcloud CalDAV Account in macOS fails: "Accountname/Password couldn't be verified"

ℹ️ Support
4

Via https.

I also tried to add an CalDAV Account on an iPhone with iOS12. It doesn’t work neither, I get the same result as on the macOS.

The login into the webinterface works fine.

I tried the following method (Posting 4) as well, without success: