Hello, I have noticed a problem with saving and loading. Whenever I load previous save states even if they're from hours before, the quest progression is as if I had played up until my most recent save. For example I got the quest to exorcise Mother Superior at which point I needed to go back to the Crucible to find an entity underneath the place. However the door was locked after the anvil area where you get the Wall Crusher ability. I checked everywhere, but the it seemed like the key bugged out and didn't spawn so I decided to reload a save state from before the boss fight to hopefully redo it and have the key spawn in. The problem is no matter how far back I go, even if its near the start, all of my most recent quests like Exorcising Mother Superior, Saving Magda from the Crucible were still active. I also had all of the skills that I unlocked up until that point, still unlocked even though I'm supposed to be at a stage where I hadn't unlocked those skills or those quests yet. It was as if I had fast traveled to the location with all of my equipment, rather than loading a save and dialing back my progress. I don't think my save can be salvaged at this point and would have to start a new game because I am unable to rewind or progress.
I will take a closer look at the save system. But for your current progress I can tell you that you are looking in the wrong place. The entity that you are needing to find is beneath the CATHEDRAL not the CRUCIBLE. Just outside the cathedral entrance and to the right there is a underground entrance (looks like a stone sewer opening).