I think the dark descent quest is broken

i wanted to finish all the quests i have so i did them and when i got the the dark descent quest it kinda stopped.
it was in the gray aria with the large skull, when i went into the skull's mouth and fell down a pit the pit was blocked off, i looked up alot of tutorials but dose annyone know why its blocked?

thanks in advance for ur replys

 

I hate to post repetitively about the same post, but I cant post links until I have 10 posts, so ill do a little copy and paste.
A lot of people are getting stuck on the same quest.

Solution to The Dark Descent quest:
If you are already stuck in the "Void" black room with no exit, the only way out is /kill which will cost 2 soul points.

1. Restart the quest at the first floor of the tower, where the animation of you falling through the floor is.
2. Continue about the quest normally until you reach the point to collect the gem.
3. Do the cloud parkour and retrieve the gem.
4. Walk through the mouth of the skull until you reach the room with the huge door that opens.
5. Before walking through the huge door, throw the gem out of your inventory and continue through.
6. the game will put you back in the same dark "Void" room but this time the story text will prompt up.
7. Press shift to finish the dialogue and you're out.