Yeah, this has become "Screenconnect doesn't work on linux" and made the sales documentation straight up false advertising. "Works on Linux, but not on Red Hat, Ubuntu, SUSE, or any other system you expect to find in business."

To the others on this thread pulling their hair out, XFCE and Cinnamon are still not wayland-ready, so are potentially an indicator of a "ScreenConnect might work" distro. Fedora spins of either, or Linux Mint, which is the project that develops Cinnamon. Even this has Wayland support in Alpha now though. Unfortunately, Connectwise appears to be willing to let the support die on the vine. 

Bumping this. It's getting to the point that I'm shopping screenconnect replacements for poor Linux client support.