I was doing the "Secure the workshop at Croup Manor" part of the "Clearing the Way for Tenpines Bluff" quest. I got to Croup Manor, killed all the outside ghouls and went in the building. Killed everything on first floor, didn't loot. Went upstairs to second floor, killed all ghouls, didn't loot. Went up to third floor, got to the last door which i was able to pick open then killed the putrid feral ghoul within, THEN I started looting, starting with the basemant key. Got the key and went straight to the basemant door. When I got there, there was no indicator asking for the "Croup Manor Basemant Key", no lock for me to pick, nothing... Then I check a website to see if I missed something, and it said I needed to find the "Croup Manor Bedroom Key" to open the room with the putrid feral ghoul. So I went to the second floor, found the key, went back to the basemant door, STILL no indicator asking for the "Croup Manor Basemant Key", no lock for me to pick, nothing...

QUESTION.... How do I finish this quest ? I've done everything else, including killing the monster Mireluck Queen, which was a royal pain..... Any help would be greatly appreciated, otherwise I have to skip this.... Thanks....

UPDATE.... As soon as I posted this, the game sent a message saying I failed the quest... Still trying to figure out how I failed it when I had the keys, but the door wouldn't open....