Every time I try to use kubejs to change loottables or recipes and try to use /reload in game, Minecraft crashes.

java.lang.IllegalStateException: Accessing LegacyRandomSource from multiple threads
at TRANSFORMER/[email protected]/net.minecraft.util.ThreadingDetector.makeThreadingException(ThreadingDetector.java:84) ~[client-1.21.1-20240808.144430-srg.jar%23411!/:?] {re:mixin,pl:connector_pre_launch:A,re:classloading,pl:mixin:APP:cupboard.mixins.json:ThreadingDetectorMixin from mod cupboard,pl:mixin:A,pl:connector_pre_launch:A}

latest.log

server.log

crash-2025-08-02_17.33.11-client.txt

cupboard only logs the full cores, it does not use any random whatsoever.
If you want to avoid that error install structure essentials