Blood Altar Cannot Create Item

I died during my first use of the blood altar, and I just got enough animals to try again, but when I do, I get a message saying "Cannot Create Item. The Blood Altar already has an item in it.", but there isn't anything for me to loot. If anyone can help me out with this, that'd be great.


Edit: Figured it out.. Turns out I just had to hit "Craft" again