It was present back in v1.31c or so, probably got removed in later versions for some reason. I've attached a .zip to this post with what I'm fairly sure are the relevant files; try extracting that into your EB/data folder and see if you're then able to play the Battle of Chaeronea(I'm near-certain that's the one you tried, given the specific .cas file mentioned in that error message/the date on the screen).