You need to give us more information than that if you want help. Did you install the mod correctly? Are you running it with other mods? Are you using the correct version of the mod with the matching CK2 version?
Im using the latest version of the mod, and the latest version of CK2.
Ive installed it correctly (at least it always used to work whenever I installed it this way).
Im not using any other mods.
Ive tried reinstalling the mod from scratch (via SNV), but with no change.