In the Apostsay quest I opened the chest and got the journal and the box. But apparently I am also supposed to get an "Antique Holy Symbol" which is required for the quest to progress to the next step (return the amulet to the city). However in my case there was no such amulet in the chest, so the quest is stuck at this point.
Apostasy Quest not progressing - missing amulet
6 months ago