Plutonium

can you give some info on what the fix does?

Yeah, for private custom game, you wanna go to the lobby, change party privacy to allow 5 players or however many up to 8. Once everyone is in, use the tilda key (key to the left of number 1 with wavy line) and type in command "xpartygo" then the game should load. You can press the tilda key again to close out the command line if it hasn't closed already.