Looking into the error logs, /var/log/roundcubemail/errors file, It is full of
[11-Jan-2020 16:05:19 America/Chicago] PHP Fatal error: Uncaught Httpful\Exception\ConnectionErrorException: Unable to connect to “https://oldserver.com:443/cloud/remote.php/carddav/addressbooks/myuser@mydomain.com/contacts/”: 7 Failed to connect to oldserver.com port 443: No route to host in /usr/local/lib/roundcubemail/plugins/carddav/vendor/nategood/httpful/src/Httpful/Request.php:1028
Stack trace:
#0 /usr/local/lib/roundcubemail/plugins/carddav/vendor/nategood/httpful/src/Httpful/Request.php(204): Httpful\Request->buildResponse(false)
#1 /usr/local/lib/roundcubemail/plugins/carddav/carddav_common.php(233): Httpful\Request->send()
#2 /usr/local/lib/roundcubemail/plugins/carddav/carddav_backend.php(454): carddav_common
It looks like the carddav is trying to connect to an old server that is turned off. I turn the old server back on and everything works perfectly. I turn the old server off and then contacts fails to open. I deleted all the contacts that I exported from the old server. It has to be an issue with the restore that was run, as that should be the only place the old server name could have come from?