So how exactly does this work?

I put items in the spaces and try hitting the forge button at the top of the screen, but nothing seems to appear anywhere in the vaults or on any character's inventory. I also can't pick up any of the items that I have placed in the spaces and put them back into the inventory, either.

I'm not sure if there is supposed to be a button below the items placed on the forge because I can't scroll down in TQVault's screen.