Nextcloud & MacOS - recent CalDAV synching problems

Hi all

The last few years, synching the Adressbook & Calendar of Nextcloud with a Mac has been a no-brainer:

Copy the URL from the user-profile, set in Adressbook or Calendar, finished.

With NS8, this is no more so:

The Calendar still works rock solid with the latest MacOS versions.

However, the Adressbook will connect with Nextcloud, and remain empty.
Checking Server details in Adressbook will show the URL path very different…
(The issue is here!).
But can’t do much about it.

On iOS (iPhones / iPads) both Adressbook and Calendar work since years without issues.

This is intended as an Info for Mac users (like myself), before asking support!

My 2 cents