Versions :
ExtremeReactors2-1.20.1-2.0.77.jar
ExtremeReactors2-CreateCompat-1.20.1-1.0.1.jar
ZeroCore2-1.20.1-2.1.41.jar
create-1.20.1-0.5.1.f.jar

The crash happened when I tried to open the inventory while in creative mode.

https://gist.github.com/lebanni/258dac644a34d5e20f59af3500846cc1