[Help] How to add Hyper Lighting Colored Light Core API

I've been trying to add the Hyper Lighting Colored Light Core API to use with 1.15.2 but I'm not having much luck. I followed the instructions to change the build.gradle file but have been getting build errors. I also tried turning it into a plugin using the Geckolib API Plugin as a template but it doesn't appear to be working. I haven't found any tutorials on adding an API into MCreator even after searching so that's why I'm here. Here is the CurseForge page for the Hyper Lighting Colored Light Core API in case that'll help with figuring this out. Any help is appreciated.