If it is because the game is looking for an appropiate bk2 file, and I am almost it is as that's the only thing that makes sense, really curious WHY it's happening, since that no bk2 files are directly called in any of your xmls in the mod. A chain thing going on though maybe? An xml is calling on another xml?
Not sure how much help I'm being here, but the happy/neutral/angry pic really is the only thing that makes sense to me when it comes to the CTD. That still doesn't take care of the "Missing Mood Display Def" bit, unless it is showing that because the game doesn't know what mood to display.
EDITED::: Ah. "DiplomacyMovieType". Gotcha. Gonna start looking there to see the culprit then.