Can't buy Item's from Alva

Not sure when this happened or how, but I can't buy items from Vala.

I can talk to her and attempt to buy something, but as soon as I try to drop it in my inventory, nothing happens.

as in I click it and place it in my inventory to buy an item, and nothing happens.

Please help, I am loving the early access, but am having difficulty continuing.

I found the problem. You have a limit on how much you can buy. You have to kill more monsters to increase the quantity back up.... its stupid.