Hi Steve,
It could be a firewall issue. Turn off any firewall on the computer and see if Roon sees the Remote. If so, then turn the firewall on again and configure it to permit traffic with both Roon and RAATServer. (RAATServer is new in 1.2).
Here’s some other troubleshooting steps for connections if that doesn’t work.
If that doesn’t resolve the issue then if you provide some setup and network details the support devs will look into things further.