I had a problem with installing the mod very similar(If not exactly the same) to this problem(https://forums.totalwar.org/vb/showthread.php?t=60579)
I fixed it using the directions in the last post of the that therd.But then I had another problem it said:
Scirpt error in data/exorpe decr_unit.txt, at line 6190 coloum 24

start_pri statistics refers to nonexistent projectile type "bullet"