Psycho Pike

There is a work around. Before entering the area where the door is that needs to be dispelled, to the left, there are some crumbled columns next to a set of archways. Climb up the crumbled rock and stay left over the top. Keep hopping rocks to the left until you reach a drop down into an area that is past the sealed door. You can continue the mission now and enter Ryngrims domain. It worked for me... I was frustrated with the same issue and found this work around.