I came here to report the same problem. I am playing on Steam, and happened to make a quicksave after defeating Thaos. I have tried several times (even selecting different options for the souls). It is always the same - it breaks at Caed Nua, which I am getting the best result for (bastion of stability and a beacon for travelers). No text appears on the slide, and the narrator continues talking until he is done with that slide, then it just stops. I tried verifying my files - no change. When I get home later today I will see about uploading my save and other relevant info.