Hi, 1st time poster. On Xbox 360. I am currently going through the Dawnguard quest line and encountered a serious glitch along the way. I'm not experiencing any hostility from the Moth Preist like other simular posts have reported, however I have made it to the part where the Moth Preist reads the Elder Scroll in Dawnguard Castle. I'm able to interact with him to get him to read the scroll, but once he finishes reading the scroll nothing happens. A quest marker still appears above his head and when i try to interact with him again all I get is a message saying "This Person Is Busy" and he stays busy no matter what I try to do.

I have tried deleting and reinstalling the DLC. Did the same for the title update. I've tried leaving and coming back. Tried waiting. Tried Attacking him. Tried different shouts and powers on him. Reloading saves. Exiting and entering Dawnguard Castle. Nothing is working. This I believe is another manifestasion of the same glitch that causes the Moth Preist to be hostile during the "Prophet" quest. Any ideas what I could try to do now? Or is it just matter of waiting for it to be fixed by Bethesda? Thanks for the help.

Have you tried just advancing the quest by speaking to Serana? After he reads the scroll there is no need to interact with him again until you get the two other scrolls.