I’ve played Vermintide 2 with a friend and my brother multiple times without problems in the past, but yesterday and today I was unable to join their session or have them join mine. I’ve followed your guide, but it didn’t help. I can’t even join them in public lobbies and they can’t join mine. I’ve even reinstalled the game.
My brother is in the same network, his and my computer connected to the internet via Ethernet cable straight to the router.