So I am currently playing as the USSR in the WWII scenario, and I declared war on Poland. Everything was going well, I was invading a few provinces and reaching Warsaw, but suddenly after the turn, I wasn't able to invade any provinces. Usually I would click a occupied province with an army and it would have arrows pointing to a province to let me invade it. Now, when I clicked the occupied province, nothing would happen. Also, now when I clicked the Civilization Information square (or whatever