I found this document which states that the correct URL to use is
No. The correct URL is here: https://forums.bitfire.at/post/9602
Hello there, why is the software saying <Cauldn’t find CALDAV or CardDAV service> ? What am I doing wrong ?
Please provide steps to reproduce (including Web and application server logs), DAVdroid debug info, verbose DAVdroid logs etc as described in [READ BEFORE POSTING] What’s required to diagnose a problem.
I found the solution. Because the new lôôk of the software made me loose my way (my fault). The solution was that I was putting in the wrong code in, so it could not get to my server. Thanks for this super App.