I was using my modpack with the solid mobs mod which usually has no crashed, so I decided to check the crash logs and got this ill link all the logs here: Traben-0/solid_mobs#45 (comment)

Minecraft 1.20.1 is crashing due to a mod conflict involving the Solid Mobs mod and the Citadel mod. Specifically, the crash is caused by an IllegalAccessError when Citadel attempts to access private fields in Minecraft’s Entity class.

Possible reason for Mod Conflict:

The crash report indicates:
“Error: java.lang.IllegalAccessError: class com.github.alexthe666.citadel.server.entity.collision.ICustomCollisions tried to access private field net.minecraft.world.entity.Entity.f_19793_“

This error suggests that Citadel is trying to access a private field (f_19793_) in the Entity class, which is not permitted due to Java’s access control mechanisms.

Thanks👍