Hey,
have the same issue here.
me and a budy playing co-op online. we get to the flesh gate at act II the cordial invition and nothing happends... caint talk to the lambach and nothing activates or happens when entered the room.
this is the same for both of us, we tryed loging in solo to get past it, still buged.
on login however the dialogue between my character and the Lambach starts in town.
but after walking all the way back form the waypoint at cordan's outskirts to the flesh wall nothing still...
beacuase we are online characters we can not delete our last save files or go back to a check point / last quest to try and restart the bugged quest.
are you able to roll back 1 mission / quest so that we can continue this game or provide a fix?
thanks!