[2022] Glitch? NE Utgard's vault, Yamir's blood stone 25

I somehow managed to get into the Northeast of Utgard’s Vault, Western Utgard seeking Ymir’s Blood Stone 25 without interference. I was able to slide under the floor without the hindrance of the box which I don't even think was there. Now that I have the key I can't get out of that space to go upstairs and steal the stone. I can't grab the box from under the floor to move it. I can't destroy the box with an arrow. I don't see any other means to exit. Unfortunately, My most recent saves go back to the beginning of my trip to Utgard and is far from being helpful. How can I get by this box without having to restart the entire Utgard story line?