I installed this about a day ago, and I started an England campaign. Everything worked very well, the game was going smoothly, up until about turn 16 or 17. When I ended the turn, and it reached the Kingdom of Scotland faction, the game crashed. I tried it again, and the same thing happened, over, and over, and over. So I tried re-loading an earlier save, and it did work. I think I got to around turn 20, but then it started crashing again. I'm playing the custom campaign, if that makes a difference (though I don't really see why it would). I'd really appreciate some help trying to solve this issue.
Unfortunately, that's not all. Something I've found is that when I go into battle with the Welsh, the Saethwyr units always rout instantly. Literally, the second battle starts, they all rout; and for some reason, they don't have the right skin, they just look like the rebel longbowmen unit. I understand this is a very early version and there are bound to be bugs, but I would really like to have this fixed soon. Just after playing 20 turns or so, I'd say this is better than Rule Britannia, so I'd quite like to continue with it.