Here's the crash stacktrace from the log:
java.util.ConcurrentModificationException
at java.base/java.util.HashMap$HashIterator.nextNode(Unknown Source)
at java.base/java.util.HashMap$KeyIterator.next(Unknown Source)
at java.base/java.util.Collections$UnmodifiableCollection$1.next(Unknown Source)
at TRANSFORMER/[email protected]/net.minecraft.world.entity.monster.Ravager.m_8024_(Ravager.java:2172)
at TRANSFORMER/[email protected]/com.github.sculkhorde.common.entity.SculkRavagerEntity.m_8024_(SculkRavagerEntity.java:192)
at TRANSFORMER/[email protected]/net.minecraft.world.entity.Mob.m_6140_(Mob.java:768)
at TRANSFORMER/[email protected]/net.minecraft.world.entity.LivingEntity.m_8107_(LivingEntity.java:2548)
at TRANSFORMER/[email protected]/net.minecraft.world.entity.Mob.m_8107_(Mob.java:536)
at TRANSFORMER/[email protected]/net.minecraft.world.entity.monster.Monster.m_8107_(Monster.java:42)
at TRANSFORMER/[email protected]/net.minecraft.world.entity.raid.Raider.m_8107_(Raider.java:114)
at TRANSFORMER/[email protected]/net.minecraft.world.entity.monster.Ravager.m_8107_(Ravager.java:132)
at TRANSFORMER/[email protected]/net.minecraft.world.entity.LivingEntity.m_8119_(LivingEntity.java:2298)
at TRANSFORMER/[email protected]/net.minecraft.world.entity.Mob.m_8119_(Mob.java:337)
at TRANSFORMER/[email protected]/net.minecraft.world.entity.PathfinderMob.m_8119_(PathfinderMob.java:652)
at TRANSFORMER/[email protected]/net.minecraft.server.level.ServerLevel.observable$track(ServerLevel.java:14669)
at TRANSFORMER/[email protected]/net.minecraft.server.level.ServerLevel.redirect$hkd000$observable$onTickNonPassenger(ServerLevel.java:14685)
at TRANSFORMER/[email protected]/net.minecraft.server.level.ServerLevel.m_8647_(ServerLevel.java:693)
at TRANSFORMER/[email protected]/net.minecraft.world.level.Level.mixinextras$bridge$accept$182(Level.java)
at TRANSFORMER/[email protected]/com.bawnorton.neruina.handler.TickHandler.safelyTickEntities(TickHandler.java:92)
at TRANSFORMER/[email protected]/net.minecraft.world.level.Level.wrapOperation$foj000$neruina$catchTickingEntities$notTheCauseOfTickLag(Level.java:9540)
at TRANSFORMER/[email protected]/net.minecraft.world.level.Level.m_46653_(Level.java:479)
at TRANSFORMER/[email protected]/net.minecraft.server.level.ServerLevel.m_184063_(ServerLevel.java:343)
at TRANSFORMER/[email protected]/net.minecraft.world.level.entity.EntityTickList.m_156910_(EntityTickList.java:54)
at TRANSFORMER/[email protected]/net.minecraft.server.level.ServerLevel.m_8793_(ServerLevel.java:323)
at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.m_5703_(MinecraftServer.java:893)
at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.m_5705_(MinecraftServer.java:814)
at TRANSFORMER/[email protected]/net.minecraft.client.server.IntegratedServer.m_5705_(IntegratedServer.java:89)
at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:661)
at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.m_206580_(MinecraftServer.java:251)
at java.base/java.lang.Thread.run(Unknown Source)

Something with the customServerAiStep method, though unfortunately I'm not too sure of the exact cause. It seems to occur randomly when there's a couple Sculk Ravagers around?

I have not dismissed the possibility that it could be a mixing conflict either, so let me know if there's any way I can help.
No crash report since I've got Neruina. Full Log is here, but it's a big one:
latest.log

A very odd crash report. Unfortunately, the crash report doesn't exactly tell me what could be causing it. I'm going to assume this is a mod conflict issue given the nature of it.