Need to fix Connection Error 3,

Hello, me and a friend have brought this game for the online play. We have started our save and have progessed some way. But now out of nowhere we are having touble connecting to the hoast of the game. Every time we try and invite eachother we get, a error 3 connection message. (Xbox Series X) we have tried hard reset of xbox to clear cashes, clearing MAC addresses (restarting xbox) and both our Nat types are set to Open. We are out of idea's our selfs. Please help.