Straum

This has been solved. The issue is that I was using Java 20. Switching to Java 17 solved all my problems.

Doesn't matter what mods. It fails to start. I have literally no idea what to do or what's going on. I have Java 20, Java 17, and Java 8 installed on the machine. Command line java -version and javac -version both say using Java 20. Latest log: https://pastebin.com/gSvZZaGW EDIT: It loads fine with appleskin because it doesn't have any mixin classes. But literally ONE mod (I tested with forgeendertech library mod) with mixin classes makes the server fail to load.