I just reproduced the error, as well. (yay! :thumbsup Go to Hunter, KS, where the CSA's 1st Cherokee is standing. Try to place that unit inside the Indian Village located in the province, and the game will CTD.
Sorry to say that the error is in being able to enter an Indian village in the first place. This should not be allowed because this is not a structure allowing siege. This will be fixed in the next public beta patch.
Hofstadter's Law: "It always takes longer than you expect, even when you take into account Hofstadter's law."