Did you move the barrels out of the way?
Have you been in there already? Did you return with the grail?
If so: With which game version did you start to play and at what part of the game did you update? If you had a save fom 1.29 - 1.32, then updated to 1.33, these saves could be corrupt if you have oversaved them. The worlds are resetted then - and access is difficult to several parts.
Please confirm.
Kiya
Information about patch, click here
