User blog:Dragonlordsora/Dragonrend bug

I'm trying to do the quest in which you take the Elder Scroll and get Dragonrend. After I got the Elder Scroll and went to the TOTW, I activate the scroll and go into the cutscene. But, after the battle between Alduin and the three Nords begins, Alduin just stands there while he is getting hit. He doesn't attack back and the cutscene won't progress, so I can't get out of it.