I am attempting to get CR to work for the first time. I am hoping to be use it extensively for a project I want to do next year and I am road testing, including the cloud option, and subscribing.

I have the add-on (0.28) installed on the master (Linux Ubuntu) and slave (Windows 10). The windows machine is on the same network, with the linux machine is connected to a hub on that network. I am using Blender 2.91 on both machines.

The Windows machine is visible on my Linux machine - I can connect it's drives and interact with it, send files etc. When I connect in CR, it says "connecting to nodes" and then nothing. There is no indication that the connection has failed or that the machine is connected.

I have tried several times including restarting the master machine. I checked port forwarding - there is no indication that those ports (>9000 range) are blocked, and I have ports being used in the high 9000s. I am not getting any error messages that indicate what the problem might be. Note attached image:

If I connect, I connect to the correct IP address, and I also tried the smb address, but I don't get any indication that the connection has failed or succeeded. Trying to render to prompt something does not work either.

I'm stumped. Is there anything I might have missed?