My wife and I just got to Arx in our duo LW game. We logged out last night after grabbing the waypoint. Today we started up the game and she can't join. She's on a MacBook Air, is able to open her own game to the basic new game/continue screen, but can't join the game we've been playing. When I invite her to join the multiplayer game her load bar gets to 99%, my game shows her entering (her character turns grey) then the game crashes completely back to her desktop. From her point of view, she never gets past the loading screen.

We've both verified the integrity of the game files via Steam library on our respective machines. Any other tips/suggestions?