Solved [HELP] I opened the last chest in the mines with a full inventory, and the item disappeared

[trinityep]

I reached level 120 of the regular mines, and not realizing I had a full inventory, I opened the chest and got the key to the skull mines along with the quest to find out what it does. But when I looked in my inventory it was not there, the chest was gone, and the key was not on the floor or anything. Is there anywhere it could have gone or am I just screwed?

 

[Ereo]

You're fine, the key to the skull cavern goes to your wallet, not your inventory. It's not an actual item.