I've set up port forwarding, etc, and I get this error message after opening RV House (and waiting for a bit). On the other hand, the window footer says "Centralized connected; P2P disconnected; Detected ip ...".
Finally, no users show up...
Happens often, make sure your router properly supports p2p, might be that...
tried restarting many times? also its a matter of time, maybe there was no users lol
Also make sure you have latest version.