AfterRebelion

Why wasn't this merged?

 No, it wasn't. EnderIO 5.1.51. I know there is a 5.1.52, but the server didn't update yet. And I'm pretty sure looking at the changelog that it didn't fix...

Can reproduce the same problem, with only C2ME: ``` [18abr.2021 18:31:01.519] [pool-3-thread-1/DEBUG] [mixin/]: Mixing threading.worldgen.MixinServerWorld from c2me.mixins.json into net.minecraft.world.server.ServerWorld [18abr.2021 18:31:01.530] [pool-3-thread-1/WARN] [mixin/]: Error loading class: com/ibm/asyncutil/locks/AsyncLock (java.lang.ClassNotFoundException: null) ```...

That was it, i was so familiar with the other task generating sources, that I dismissed it completely. Maybe you should add it to the readme, with the Java11+ requirement.

If you select "Proceed to main menu", it just continues. That is just a warning, indicating that the Jar has a missing pack.mcmeta