• A log if the issue is casing a crash. These are found in your instance directory under /logs
  latest.log
  crash-2023-07-19_21.13.56-server.txt

• Mod version, MC version and Loader you are using
  supplementaries-1.20-2.5.21-fabric.jar
  Minecraft 1.20.1
  Fabric 0.14.21
  Fabric API 0.86.0+1.20.1.jar

• A description of your issue and how to reproduce
  Crash when entering world caused by Supplementaries mixin. Seems to be related to mob spawning.
  This is maybe a subtle incompatibility between MC 1.20.1 and 1.20.

nvm, too much going on with this mess. Without Supplementaries a similar error still occurs (hangs instead of crashing though)