For the past few days, whenever I try to remove a few sets and/or select a few required cards, I get a "More Cards Required than Available" error and it won't let me start the game. Usually I'm able to get around it by just clicking "ready" a few times, but sometimes it won't let me actually start the game no matter how many times I click "ready." Does anyone know how to prevent this from happening, because it's starting to get on my nerves.