Create a Custom Trait - Sims 4 - Zerbu's Mod Constructor V4 Tutorial

This is probably a dumb question, but I’m using Zerbu’s mod constructor to make some custom traits and social interactions, but when I load them into my game, it all works fine until I get to build mode. Somehow my custom traits are crashing build mode and I don’t understand how it’s connected. And I checked, it is my mod causing the problem, not something else. If anyone has any idea what’s happening, tips would really be appreciated.