Smash ultimate multiplyaer not working with one person

Im trying to play SSBU with a friend, and for some reason we cant join eachother’s rooms. I can play with another just fine, same room and everything. But it’s just this one friend who isnt compatable. When is SSBU the room shows up, it says waiting for response from host, then “unable to connect”.

In order for us to provide better support, we need to see the log generated by yuzu. This guide will walk you through how you can obtain the log file: Getting Log Files - yuzu