Fixed a really big mistake i must have done while lacking some sleep. Im really sorry for the inconvenience, you can try out my mod again starting right now (hoping there are not other one like this really).
(this could have been working before for other people that have many other of my mods, because they had the missing reference)
Radiant Better Unit Promotions 1.0
This mod changes dull vanilla promotion trees into better, more realistic and funnier ones.