Crash report moved to https://pastebin.com/z6v9g6C9

Please use pastebin for crash reports, I've done it for you this time.

This crash should not be happening. I have an access transformer on that field which would prevent the IllegalAccessError, so it means somehow one of your mods is breaking access transformers. Try and find out which one, I would start by seeing if it happens without coremods.

Tried to launch Minecraft with only Mantle and Inspirations. Crashed again. https://pastebin.com/2Mkn8HFY

Yep, that is the access transformer again. No idea why it's breaking since it was working for me. I'll try a few things to see if I can get it to fail on my side.

Okay, managed to find the issue and fixed with 9a6ccad. There will be a build on Curse shortly that fixes this.

0.0.1b was just approved on CurseForge, fixing this issue.