The abovementioned quest is a coop only quest, however upon starting it states: game is out of sync. Tried it a couple of times but different players and it doesn't work.
This is a known issue. For now, both players need to exit the game and do a fresh start and then start playing. This will be resolved in the next patch.
This is a known issue. For now, both players need to exit the game and do a fresh start and then start playing. This will be resolved in the next patch.