Had the same problem. I had two copies of "Assemble the Players" on the battlefield and was not allowed to cast creatures for their disguise cost off of the top of my library. The game prompted me to select one of the "Assemble the Players" but would not actually allow me to select one. I ended up losing the match due to this error.
Rohirrim#87897
Had the same problem. I had two copies of "Assemble the Players" on the battlefield and was not allowed to cast creatures for their disguise cost off of the top of my library. The game prompted me to select one of the "Assemble the Players" but would not actually allow me to select one. I ended up losing the match due to this error.