Hoping this helps someone out. After researching and looking for answers. Finally found what I needed to fix and where. After upgrading to 13.0.7 received the same error as several others.
Your web server is not properly set up to resolve “/.well-known/caldav”.
Your web server is not properly set up to resolve “/.well-known/carddav”
Trying to find where to place the redirect was an interesting challenge. I am just learning so it took me awhile. Every install is different. I have a Manual install with Ubuntu 16.04 with LAMP. NextCould is in root and Let’s Encrypt is installed. So figuring out where to put the exception took me awhile. Thanks to this post I finally tried and found the solution that worked for me.
Here it goes.
The redirect had to be placed under sites-available in the 000-default-le-ssl.conf file. Thanks to blackcrack and all the other posts. It has cleared the error, though I think it needs to be a fix.
<IfModule mod_dav.c> Dav off </IfModule> </Directory> Redirect 301 /.well-known/carddav /nextcloud/remote.php/dav Redirect 301 /.well-known/caldav /nextcloud/remote.php/dav