Need Help Please

I am playing on xbox one. I cannot end the siege quest or start the oath is an oath quest (both want you to talk to Sir Divish). Problem is there is no sir divish in any of the camps, his marker is inside the castle walls of talmberg. I do not want to fall back to an earlier save as I did a fee other things before wanting to start the oath is an oath.

Please help, is there anything that gets him back to the main camp?