Problem with NC 12 and macOS CalDAV-Account

Thanks for your questions.
We solved the problem by applying the hint from nickvergessen in the following Question:

URL: NC12 Authentication issue with Cardav, Caldav and Sogo connector

Hint:

apps/dav/appinfo/v1/webdav.php

$authPlugin->addBackend($bearerAuthPlugin);

with:

// FIXME I disabled this myself following NC12 Authentication issue with Cardav, Caldav and Sogo connector $authPlugin->addBackend($bearerAuthPlugin);

apps/dav/lib/Server.php

$authPlugin->addBackend($bearerAuthBackend);

with:

// FIXME I disabled this myself following NC12 Authentication issue with Cardav, Caldav and Sogo connector $authPlugin->addBackend($bearerAuthBackend);