Describe the bug
Adding mod to dev workspace perform crash

To Reproduce
Steps to reproduce the behavior:

1. Download xray-1.16.4-2.6.0.jar from curse
2. Move to ./run/mods/ directory
3. Run game with runClient idea task
4. Wait for loading

Expected behavior
Game must load correctly and mod must work

Crash-report
https://gist.github.com/hohserg1/b83bc64567775fc224af1450d84c4c8b

Minecraft Enviorment

• Minecraft Version: 1.16.4
• XRay Mod Version: 1.16.4-2.6.0
• Forge Version 1.16.4-35.1.10

Additional context
I want to use this mod to test worldgen in my mod

That's not how you use mods in 1.12+ dev env's you need to use your gradle file to import it as a dependency