I reloaded from an earlier save where I didn't kill the Sallow Man and Alexander appeared in the Arena and the cut scene continued as intended and I was able to progress.
Edit: I've been trying other saves to see what causes this issue. It is unrelated to killing the Sallow man.
Edit 2: The game gets stuck because Alexander is supposed to be in the Arena where he is killed by Dallis, but since he's not there, the game won't progress. As for why he doesn't show up, I cannot say. I reloaded an earlier save, did everything the same things as I did before and for some reason he shows up now.
Edit 3: All my saves after the arena crash while loading.
Last edited by Genadi; 19/10/17 11:21 PM.