im trying to replay through the genghis khan campaign im trying to go through the horde that rides west mission but every time i try to load into it after the cutscene i get the player 3 ai script error ai file error:"mongols-scn4 player 3 line 1844 err2004 misssing identifier boyar-line i have no idea what has to be done to fix it so any ideas would help

What data mod are you using? I assume basic AOC.
What mod gave you the campaings?
Do you have any AI mods installed?

1: I think it's aoc Idk how to check.

2: I'm pretty sure ghanghis kahn was base game no mods required

3: there might be a ai bot data pack I have that might be causing it.

All in all I haven't touched it in a while I'm gonna see if unsubbing all the data packs I have will fix it

Edit: unsubbing to all the data packs I had seemed to have fixed it thanks for the help

If you have the game from Steam and play here through the Compatibility Patch, you can not access the campaigns. However, I know there are some mods that add campaings as scenarios.

It may be that some AI mod you have from Voobly was conflicting with the base game, disabling them was surely the solution.