This is a game I've been running on observe. When I loaded it in observer mode (via the "continue" button on the launcher) and tried to ctrl+click on the Aztec Emperor to temporarily "switch" to him without a console command, the game would reliably crash. If I load the game from the load menu and select the Aztec Emperor as the character to play, it is fine. I'm not sure what the problem is. This was saved on the latest (non-beta) patch.