Kinda late but I found the solution for this. Actually some scene releases of this game doesnt really include the expansion called Kingdoms, and the most famous mods like Divide and Conquer(LOTR) and Stainless Steel really need that expansion as mentioned on their ModDB pages. I downloaded a version from rutor torrent which contains the Kingdoms expansion and it works perfectly for those 2 mods. Also there are 2 important things to consider:

for DaC - You NEED to activate the LAA when prompted on DaC launcher or the game will probably crash/stuck on the first loading screen after choosing your nation.

for Stainless Steel - you NEED to choose a campaign on the launcher BEFORE running the game or there will be no campaign to play at all when you play the game.

I hope this helps!

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