@andreas-4 said in no calDav or no cardDAV client found / Es konnte weder calDAV noch cardDAV Dienst gefunden werden:
Of course the IP 31.123.456.789 does not exist/ is not in use (also sub.domain). For public discussion I change it. First I did a mistake in the URL, in this case I got a hint for wrong URL.
Ah, the IP isn’t even valid. I didn’t have a look at it, just copied it… so, are you sure the IP address/port from your error message is reachable from your WiFi connection?
I’m using DDNS and with thunderbird / lightning on ubuntu it runs perfectly about months and it is reachable (I checked before and after I took the protocol).
Unfortunately, I can’t provide much help with this problem because it’s not a problem within DAVdroid.
Can you access your server with the tablet Web browser?