Does someone know how to add missing references?

Some child or something becomes of age in my game and it crashes with exception of "campaign teleport behaviour" with first line saying some sort of reference Is missing, I believe this is due to something some mod has added and the game can't find a template for it when it needs to, how can I find out what template I need to look for and where to look for it and how do I fix my game

submitted by /u/Prizrak171980
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