Im running forge 36.1.10 and minecraft 1.16.5

[09:28:55] [Server thread/ERROR]: Exception caught during firing event: top.theillusivec4.champions.common.entity.EnkindlingBulletEntity cannot be cast to net.minecraft.entity.LivingEntity
Index: 3
Listeners:
0: HIGHEST
1: ASM: class com.github.clevernucleus.playerex.init.EventHandler onLivingHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
2: NORMAL
3: ASM: class com.coldspell.coldsteel.abilities.OnHurtEntity onHurtEffect(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
4: ASM: class tallestegg.guardvillagers.HandlerEvents onEntityHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
5: ASM: class com.majruszs_difficulty.events.when_damaged.WhenDamagedEvent onAttack(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
6: ASM: class com.majruszs_difficulty.events.treasure_bag.UpdatePlayerList onHit(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
7: ASM: class net.silentchaos512.scalinghealth.event.PlayerBonusRegenHandler onPlayerHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
8: ASM: class cursedflames.bountifulbaubles.common.baubleeffect.EventHandlerEffect onHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
9: ASM: com.bobmowzie.mowziesmobs.server.ServerEventHandler@4b126e4c onLivingDamage(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
10: ASM: class com.teammetallurgy.aquaculture.misc.NeptunesMight onAttack(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
11: ASM: class com.teammetallurgy.atum.items.artifacts.atem.AtemsProtectionItem onLivingDamage(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
12: ASM: class com.teammetallurgy.atum.items.artifacts.seth.SethsStingItem onHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
13: ASM: class com.teammetallurgy.atum.items.artifacts.nuit.NuitsIreItem onHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
14: ASM: class com.teammetallurgy.atum.items.artifacts.nuit.NuitsQuarterItem onHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
15: ASM: class com.teammetallurgy.atum.items.artifacts.anubis.AnubisWrathItem onHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
16: ASM: class com.teammetallurgy.atum.items.artifacts.nepthys.NepthysGuardItem onLivingHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
17: ASM: class com.teammetallurgy.atum.items.artifacts.nepthys.NepthysConsecrationItem onHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
18: ASM: class com.teammetallurgy.atum.items.artifacts.nepthys.NepthysBanishingItem onHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
19: ASM: class com.teammetallurgy.atum.items.artifacts.geb.GebsUndoingItem onAttack(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
20: ASM: class com.teammetallurgy.atum.items.tools.GauntletItem onHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
21: ASM: class com.teammetallurgy.atum.items.tools.ClubItem onHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
22: ASM: class com.teammetallurgy.atum.items.tools.HammerItem onHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
23: ASM: class com.teammetallurgy.atum.misc.event.AtumEventListener onLivingHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
24: ASM: class com.teammetallurgy.atum.entity.projectile.PharaohOrbEntity onBerserk(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
25: ASM: class chumbanotz.mutantbeasts.EventHandler onLivingHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
26: ASM: class insane96mcp.progressivebosses.events.LivingHurt eventLivingHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
27: ASM: class com.baguchan.enchantwithmob.CommonEventHandler onEntityHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
28: ASM: class com.oblivioussp.spartanweaponry.event.CommonEventHandler onLivingHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
29: ASM: class com.infamous.dungeons_mobs.MobEvents onSnowballDamageMob(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
30: ASM: class twilightforest.TFEventListener entityHurts(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
31: ASM: class twilightforest.item.ItemTFMinotaurAxe onAttack(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
32: ASM: class quek.undergarden.item.tool.UGSwordItem attackEvent(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
33: ASM: class quek.undergarden.item.tool.UGShovelItem attackEvent(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
34: ASM: class quek.undergarden.item.tool.UGPickaxeItem attackEvent(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
35: ASM: class quek.undergarden.item.tool.UGAxeItem attackEvent(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
36: ASM: net.mcreator.villageemployment.procedures.WhenPlayerIsHurtProcedure@2da70c4 onEntityAttacked(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
37: ASM: class slimeknights.tconstruct.shared.AchievementEvents onDamageEntity(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
38: ASM: class com.danny.dannys_expansion.core.events.HurtEventHandler hurtEvent(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
39: ASM: top.theillusivec4.champions.common.ChampionEventsHandler@4decc78a onLivingHurt(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
40: ASM: com.github.alexthe666.iceandfire.event.ServerEvents@18d66618 onEntityDamage(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
41: LOW
42: ASM: org.jwaresoftware.mcmods.lib.impl.effects.NourishmentEffectsEventsHandler@531c9a66 onEntityDamagedByTHE(Lnet/minecraftforge/event/entity/living/LivingHurtEvent;)V
java.lang.ClassCastException: top.theillusivec4.champions.common.entity.EnkindlingBulletEntity cannot be cast to net.minecraft.entity.LivingEntity
at com.coldspell.coldsteel.abilities.OnHurtEntity.onHurtEffect(OnHurtEntity.java:26)
at net.minecraftforge.eventbus.ASMEventHandler_18_OnHurtEntity_onHurtEffect_LivingHurtEvent.invoke(.dynamic)
at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:85)
at net.minecraftforge.eventbus.EventBus$$Lambda$2622/498439173.invoke(Unknown Source)
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:302)
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:283)
at net.minecraftforge.common.ForgeHooks.onLivingHurt(ForgeHooks.java:362)
at net.minecraft.entity.LivingEntity.func_70665_d(LivingEntity.java:1472)
at net.minecraft.entity.LivingEntity.func_70097_a(LivingEntity.java:984)
at top.theillusivec4.champions.common.entity.EnkindlingBulletEntity.bulletEffect(EnkindlingBulletEntity.java:35)
at top.theillusivec4.champions.common.entity.AbstractBulletEntity.bulletHit(AbstractBulletEntity.java:335)
at top.theillusivec4.champions.common.entity.AbstractBulletEntity.func_70071_h_(AbstractBulletEntity.java:255)
at net.minecraft.world.server.ServerWorld.func_217479_a(ServerWorld.java:611)
at net.minecraft.world.server.ServerWorld$$Lambda$31552/998685353.accept(Unknown Source)
at net.minecraft.world.World.func_217390_a(World.java:554)
at net.minecraft.world.server.ServerWorld.func_72835_b(ServerWorld.java:404)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:851)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:787)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:118)
at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:642)
at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:232)
at net.minecraft.server.MinecraftServer$$Lambda$30430/162565732.run(Unknown Source)
at java.lang.Thread.run(Thread.java:745)

[09:28:55] [Server thread/FATAL]: Preparing crash report with UUID 6f98f246-b1f5-4727-824f-6375c8099624
[09:28:55] [Server thread/ERROR]: Encountered an unexpected exception
net.minecraft.crash.ReportedException: Ticking entity
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:855) ~[?:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:787) ~[?:?]
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:118) ~[?:?]
at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:642) [?:?]
at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:232) [?:?]
at net.minecraft.server.MinecraftServer$$Lambda$30430/162565732.run(Unknown Source) [?:?]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_51]
Caused by: java.lang.ClassCastException: top.theillusivec4.champions.common.entity.EnkindlingBulletEntity cannot be cast to net.minecraft.entity.LivingEntity
at com.coldspell.coldsteel.abilities.OnHurtEntity.onHurtEffect(OnHurtEntity.java:26) ~[?:1.0]
at net.minecraftforge.eventbus.ASMEventHandler_18_OnHurtEntity_onHurtEffect_LivingHurtEvent.invoke(.dynamic) ~[?:?]
at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:85) ~[eventbus-4.0.0.jar:?]
at net.minecraftforge.eventbus.EventBus$$Lambda$2622/498439173.invoke(Unknown Source) ~[?:?]
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:302) ~[eventbus-4.0.0.jar:?]
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:283) ~[eventbus-4.0.0.jar:?]
at net.minecraftforge.common.ForgeHooks.onLivingHurt(ForgeHooks.java:362) ~[?:?]
at net.minecraft.entity.LivingEntity.func_70665_d(LivingEntity.java:1472) ~[?:?]
at net.minecraft.entity.LivingEntity.func_70097_a(LivingEntity.java:984) ~[?:?]
at top.theillusivec4.champions.common.entity.EnkindlingBulletEntity.bulletEffect(EnkindlingBulletEntity.java:35) ~[?:task ':jar' property 'archiveVersion']
at top.theillusivec4.champions.common.entity.AbstractBulletEntity.bulletHit(AbstractBulletEntity.java:335) ~[?:task ':jar' property 'archiveVersion']
at top.theillusivec4.champions.common.entity.AbstractBulletEntity.func_70071_h_(AbstractBulletEntity.java:255) ~[?:task ':jar' property 'archiveVersion']
at net.minecraft.world.server.ServerWorld.func_217479_a(ServerWorld.java:611) ~[?:?]
at net.minecraft.world.server.ServerWorld$$Lambda$31552/998685353.accept(Unknown Source) ~[?:?]
at net.minecraft.world.World.func_217390_a(World.java:554) ~[?:?]
at net.minecraft.world.server.ServerWorld.func_72835_b(ServerWorld.java:404) ~[?:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:851) ~[?:?]
... 6 more

This is on the Colds: Steel mod's end and I believe they've fixed it already.

he did :) but thanks for the reply