Seemingly valid mod crashes game on world gen

I'm working on a mod for version 1.14.4 with MCreator that adds lightsabers. I'm not 100% sure what I did, but it was working the other day and now when I launch the game and create or enter a world it crashes with

java.lang.IllegalArgumentException: bound must be positive

I've zipped my entire project workspace and uploaded it to Google Drive.

Thanks in advance for your help!