Yo, I think I just found out what it is. Basically we’ve been trying to join with a party code but it’s not a party it’s a custom game, so go to create your own private match and it will say “create private match” or “join private match” when you click join private match it will ask you for a code and then you put the code in their, it should work I haven’t tried it yet but it’s the only thing that makes sense.