Hello,
i've read about this error, which means a DNS-Problem. Some hints:
I'm using an Apple MDM and have set up an cardDAV-Server with "Radicale". If i set up the account for this cardDAV on the iPhone manually, everything works fine, i even can get the Website on my cardDAV in Safari without problems.
If i deploy this payload with my MDM, i'll get the Error
and after
We'll refresh if we find a better network connection.
I don't understand where the problem is.
Thomas