Hello @dennis-360ict
On this forum when you’re typing something related to code, highlight your textzone and select “Preformatted Text” because your link isn’t valid as we see it.
For me, Nextcloud 12 User, in order to connect to my instance with webdav it’s this link :
Windows in connect to a network drive : \\cloud.example.com@SSL\DavWWWRoot\remote.php\dav\files\username\
OS X in finder -> Go To -> Connect to server : https://cloud.example.com@SSL/remote.php/dav/files/username/
With of course HTTPS port on 443