Why are you using this awful browser software?
I think it's a XenForo thing tbh mate. I'm sure it was only Chrome or Firefox. Means it's time to step up from those shoddy browsers. Will check and confirm tomorrow
What does the NAT Type show on your network test? Then same applies to the lobby host.
Best advice is to restart your router, restart your console, go straight to the menu screen of the game and STAY there until you get an invite, once you get an invite go straight there and see if that's...