Don't know if you fixed the problem yet or not. But I had to stop loading the music pack mod to get the game to run. A message pops up in the start menu saying missing music files are required but so far the game is completely playable.

interesting i have the same problem and no one else seems to have it

i disabled music and it still wont launch

I have the exact same issue: I load it up with all the right files and load into the menu, but then half way through loading my campaign, it crashes. Idk if this has anything to do with it crashing but I went and started up a WRE campaign in normal Attila while I was in the middle of the medieval kingdoms campaign. So Im completely lost on what to do.

same issue

ı have no campaign button if ı try to enter special room and run a battle, a bit time later game crashes. ı downloaded everything model pack 8 as well