Dibella mission problem

So I got this quest where I had to investigate on fake Dibella’s witnessing. Cutting long story short, it’s final part is exploring the ruins of hold of kinging in shalgora, where I’m supposed to find an MIA priestess of Dibella or a proof of her death. I think i spent like 3 hours going around this dungeon, even went to noclip mode in desperacy, and i still can’t find nothing. I’m pretty sure I’ve wiped the whole dungeon, but maybe I’ve missed something. Anyone got any clues? I’m pretty new to the game.