Minecraft Version

1.21.1

Immersive Engineering Version

12.0.0-180

How did it happen?

installing mods, Friends United 2.1 mod pack. Crash when world load.

Crash Log

https://gist.github.com/Zelioth/a7afd470425bea5dc2d95e9a139a7d5f

Already fixed for the next release. This is caused by some other mod shipping outdated (cloche?) recipes, and IEs codecs not handling that properly.