I have fabric server version 1.20.2 and everytime i connect with it with JER installed in client i always get stuck at "Joining world" menu and my client start to not responed anymore but if i remove the JER in my mod folder, i can join normal without a problem.
i have JEI installed in server side as well the world-gen.json file config for the world both installed in server and client yet still causing not responding when joining.

Error Log

JER seems to hang completely, pretty strange. Is this with a specific mod pack?

[14:27:18] [pool-26-thread-1/ERROR]: Registering categories: minecraft:jeresources is running and has taken 17.08 minutes so far
[14:27:23] [pool-26-thread-1/ERROR]: Registering categories: minecraft:jeresources is running and has taken 17.17 minutes so far
[14:27:28] [pool-26-thread-1/ERROR]: Registering categories: minecraft:jeresources is running and has taken 17.25 minutes so far
[14:27:33] [pool-26-thread-1/ERROR]: Registering categories: minecraft:jeresources is running and has taken 17.33 minutes so far```

Same here

I have noticed the same issue on Fabric 1.20.1. Thing is, there shouldn't be any mods installed, that interfere with client-side JER. There actually is that mod called "Infinity Cave" on client and server, could this have something to do with that?