So I was about to start a snakewater lobby, but when I tried to join it said that I was missing snakewater. I figured it was a bug with the server. Then I tried to go pubbing on gravelpit while waiting for another lobby, and it was missing that too. I checked my maps file, it still exists, but the only folder in there is workshop, which is empty. Nothing was wrong with my tf2 literally minutes before. All that had changed was that I restarted my game.