According to your testing, does the issue occur with ONLY Immersive Portals mod and Farbic API?

No

Describe the issue

Server crash when I add this mod and enter the world.

Post the log here

https://gist.github.com/12345-mcpython/a6b49621d238b5f2dc8dba2ff0627eec

A Mixin conflict with Krypton

Tracked in #18