macOS/IOS configuration profile

downloading and installing the macOS configuration profile results an emty calendar namend nextcloud and an empty adress book named nextcloud. Trying a calDAV / cardDAV setup with https://mysite.com/nextcloud/remote.php/dav/calendars/myname/ will not connect either but works with my other OSX PIM software.
How to connect OSX native addressbook and calendar with help of nextcloud’s profiles? Using Nextcloud 20.0.1