Describe the bug you're experiencing

I was on my pack (could be my own fault) opened a Lan for Creative to check world generation and TP to a few structures. When loading up a Yung better Dungeons in game from a TP to check the structure I got a crash with this. I not sure myself what in the world happened it was working before updates So is it incompatible with xaero, artifacts or Yungs since the updates?

I am also seeing Sinytra Connector ( Fabric to Forge connector) could be an issue.
Having issues locating the main cause cause it not even suppose to be "server" in a private test world (with Mods incompatible for a server to begin with.) It a mess since the mod updates.

Reproducability

I have yet to be able to replicate it again, reloading it did not cause the error.

Mod up to date

• Before submitting this issue I updated to the newest version and reproduced it

Minecraft version

1.20.1

Modloader version

Forge

Logs

https://gist.github.com/Damalas75/2c3671ba599a85dfa299a024dc431e93

ye that is unrelated to cupboard, it doesnt use randomsources. Its one of your mods using the randomsource on multiple threads at once, cupboard just has additional error logging for it. I actually have a mod that prevents that error, you could add it as a workaround: https://www.curseforge.com/minecraft/mc-mods/structure-essentials-forge-fabric