I was progressing through the Eye of Magnus quest when after defeating Ancano I was asked to speak with Tolfdir. I could only ask to what next and then I couldn't speak with him again. I tried multiple times, killing Ancano again, reloading the game, and reloading the area. When I first speak with him, I ask him what next and he will say his dialog and then the game will just sit there and will do nothing until I press B to exit. Please help, I would like to be able to finish the College of Winterhold.