Blocked progression in episode storyline
Did you travel up to the room (arena) above? That’s where the instance is, I believe.
Or, maybe that’s a different part; it’s been so long.
Good luck.
(edited by Inculpatus cedo.9234)
Do you have Counter Magic? It’s required to start the instance. The instance start location should pop up when you fall to the ground level of the crater. Some steps can be interrupted by leaving, like changing maps, so try talking to Bennett again.