Describe the bug
Crash at world loading

Versions
sophisticatedbackpacks-1.16.4-2.2.8.234.jar
Forge: net.minecraftforge:36.1.0

https://paste.ee/p/YSFzC

Could you just confirm for me one thing? I am guessing you have switched from one world to another while still running the modpack right?

I have saved my world and loaded the world a second time.

yup, so I am pretty sure what happened is there was a sound playing from one of the backpacks and info on that stayed in the cache and then when the world was loaded the second time it actually seems to be able to run world tick before there is connection to the world and tries to tell server the sound is no longer playing on client but crashes on missing connection. I will get this fixed so that the cache is cleared when player leaves world / logs out from server

Thx, keep up the good work!

this is now fixed in the latest release on CF