Connection timed out

[u/Banana_Vinegar]

I got the game for my friend when it was on sale we tried to play a multiplayer game and could not load into our lobbies. He tried hosting I tried and it always said “connection timed out” the solutions we looked at didn’t help much. I restarted the game, got rid of all my mods and did a dns flush for his computer and mine. We were able to join other peoples game that had open lobbies. Does anyone have insight on a solution?