Mob mimic disconnects me users from the server when they hit it by completely closing the minecraft launcher attached error.

---- Minecraft Crash Report ----
// Don't be sad, have a hug! <3

Time: 9/13/22, 9:41 PM
Description: Unexpected error

java.lang.NullPointerException: Cannot invoke "net.minecraft.server.MinecraftServer.m_129921_()" because "de.budschie.bmorph.main.ServerSetup.server" is null
at de.budschie.bmorph.events.Events.onTargetBeingSet(Events.java:615) ~[bmorph-1.18.2-1.0.1.jar%2363!/:1.18.2-1.0.1] {re:classloading}
at net.minecraftforge.eventbus.ASMEventHandler_102_Events_onTargetBeingSet_LivingSetAttackTargetEvent.invoke(.dynamic) ~[?:?] {}
at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:85) ~[eventbus-5.0.3.jar%232!/:?] {}
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:302) ~[eventbus-5.0.3.jar%232!/:?] {}
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:283) ~[eventbus-5.0.3.jar%232!/:?] {}
at net.minecraftforge.common.ForgeHooks.onLivingSetAttackTarget(ForgeHooks.java:292) ~[forge-1.18.2-40.1.76-universal.jar%23145!/:?] {re:classloading}
at net.minecraft.world.entity.Mob.m_6710_(Mob.java:209) ~[client-1.18.2-20220404.173914-srg.jar%23140!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
at artifacts.common.entity.MimicEntity.m_6710_(MimicEntity.java:151) ~[artifacts-1.18.2-4.1.0.jar%2359!/:1.18.2-4.1.0] {re:classloading}
at artifacts.common.entity.MimicEntity.m_6469_(MimicEntity.java:157) ~[artifacts-1.18.2-4.1.0.jar%2359!/:1.18.2-4.1.0] {re:classloading}
at net.minecraft.world.entity.player.Player.m_5706_(Player.java:1126) ~[client-1.18.2-20220404.173914-srg.jar%23140!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mca.mixin.json:MixinPlayerEntity,pl:mixin:APP:byg.mixins.json:common.entity.MixinPlayer,pl:mixin:APP:expandability.mixins.json:swimming.PlayerMixin,pl:mixin:A}
at net.minecraft.client.multiplayer.MultiPlayerGameMode.m_105223_(MultiPlayerGameMode.java:360) ~[client-1.18.2-20220404.173914-srg.jar%23140!/:?] {re:mixin,pl:runtimedistcleaner:A,re:classloading,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.m_202354_(Minecraft.java:1504) ~[client-1.18.2-20220404.173914-srg.jar%23140!/:?] {re:mixin,pl:accesstransformer:B,xf:fml:customskinloader:MinecraftTransformer,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,xf:fml:customskinloader:MinecraftTransformer,pl:mixin:APP:rubidium.mixins.json:core.MixinMinecraftClient,pl:mixin:APP:balm.mixins.json:MinecraftMixin,pl:mixin:APP:iceberg.mixins.json:MinecraftMixin,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_Keybinds,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_PipelineManagement,pl:mixin:APP:architectury.mixins.json:MixinMinecraft,pl:mixin:APP:byg_forge.mixins.json:client.MixinMinecraft,pl:mixin:APP:securitycraft.mixins.json:camera.MinecraftMixin,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.m_91279_(Minecraft.java:1849) ~[client-1.18.2-20220404.173914-srg.jar%23140!/:?] {re:mixin,pl:accesstransformer:B,xf:fml:customskinloader:MinecraftTransformer,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,xf:fml:customskinloader:MinecraftTransformer,pl:mixin:APP:rubidium.mixins.json:core.MixinMinecraftClient,pl:mixin:APP:balm.mixins.json:MinecraftMixin,pl:mixin:APP:iceberg.mixins.json:MinecraftMixin,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_Keybinds,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_PipelineManagement,pl:mixin:APP:architectury.mixins.json:MixinMinecraft,pl:mixin:APP:byg_forge.mixins.json:client.MixinMinecraft,pl:mixin:APP:securitycraft.mixins.json:camera.MinecraftMixin,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.m_91398_(Minecraft.java:1670) ~[client-1.18.2-20220404.173914-srg.jar%23140!/:?] {re:mixin,pl:accesstransformer:B,xf:fml:customskinloader:MinecraftTransformer,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,xf:fml:customskinloader:MinecraftTransformer,pl:mixin:APP:rubidium.mixins.json:core.MixinMinecraftClient,pl:mixin:APP:balm.mixins.json:MinecraftMixin,pl:mixin:APP:iceberg.mixins.json:MinecraftMixin,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_Keybinds,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_PipelineManagement,pl:mixin:APP:architectury.mixins.json:MixinMinecraft,pl:mixin:APP:byg_forge.mixins.json:client.MixinMinecraft,pl:mixin:APP:securitycraft.mixins.json:camera.MinecraftMixin,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.m_91383_(Minecraft.java:1021) ~[client-1.18.2-20220404.173914-srg.jar%23140!/:?] {re:mixin,pl:accesstransformer:B,xf:fml:customskinloader:MinecraftTransformer,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,xf:fml:customskinloader:MinecraftTransformer,pl:mixin:APP:rubidium.mixins.json:core.MixinMinecraftClient,pl:mixin:APP:balm.mixins.json:MinecraftMixin,pl:mixin:APP:iceberg.mixins.json:MinecraftMixin,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_Keybinds,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_PipelineManagement,pl:mixin:APP:architectury.mixins.json:MixinMinecraft,pl:mixin:APP:byg_forge.mixins.json:client.MixinMinecraft,pl:mixin:APP:securitycraft.mixins.json:camera.MinecraftMixin,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.m_91374_(Minecraft.java:665) ~[client-1.18.2-20220404.173914-srg.jar%23140!/:?] {re:mixin,pl:accesstransformer:B,xf:fml:customskinloader:MinecraftTransformer,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,xf:fml:customskinloader:MinecraftTransformer,pl:mixin:APP:rubidium.mixins.json:core.MixinMinecraftClient,pl:mixin:APP:balm.mixins.json:MinecraftMixin,pl:mixin:APP:iceberg.mixins.json:MinecraftMixin,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_Keybinds,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_PipelineManagement,pl:mixin:APP:architectury.mixins.json:MixinMinecraft,pl:mixin:APP:byg_forge.mixins.json:client.MixinMinecraft,pl:mixin:APP:securitycraft.mixins.json:camera.MinecraftMixin,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.main.Main.main(Main.java:205) ~[client-1.18.2-20220404.173914-srg.jar%23140!/:?] {re:classloading,pl:runtimedistcleaner:A}
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {}
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?] {}
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {}
at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?] {}
at net.minecraftforge.fml.loading.targets.CommonClientLaunchHandler.lambda$launchService$0(CommonClientLaunchHandler.java:31) ~[fmlloader-1.18.2-40.1.76.jar%2317!/:?] {}
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-9.1.3.jar%235!/:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53) [modlauncher-9.1.3.jar%235!/:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71) [modlauncher-9.1.3.jar%235!/:?] {}
at cpw.mods.modlauncher.Launcher.run(Launcher.java:106) [modlauncher-9.1.3.jar%235!/:?] {}
at cpw.mods.modlauncher.Launcher.main(Launcher.java:77) [modlauncher-9.1.3.jar%235!/:?] {}
at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26) [modlauncher-9.1.3.jar%235!/:?] {}
at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23) [modlauncher-9.1.3.jar%235!/:?] {}
at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:149) [bootstraplauncher-1.0.0.jar:?] {}

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Thread: Render thread
Stacktrace:
at de.budschie.bmorph.events.Events.onTargetBeingSet(Events.java:615) ~[bmorph-1.18.2-1.0.1.jar%2363!/:1.18.2-1.0.1] {re:classloading}
at net.minecraftforge.eventbus.ASMEventHandler_102_Events_onTargetBeingSet_LivingSetAttackTargetEvent.invoke(.dynamic) ~[?:?] {}
at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:85) ~[eventbus-5.0.3.jar%232!/:?] {}
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:302) ~[eventbus-5.0.3.jar%232!/:?] {}
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:283) ~[eventbus-5.0.3.jar%232!/:?] {}
at net.minecraftforge.common.ForgeHooks.onLivingSetAttackTarget(ForgeHooks.java:292) ~[forge-1.18.2-40.1.76-universal.jar%23145!/:?] {re:classloading}
at net.minecraft.world.entity.Mob.m_6710_(Mob.java:209) ~[client-1.18.2-20220404.173914-srg.jar%23140!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
at artifacts.common.entity.MimicEntity.m_6710_(MimicEntity.java:151) ~[artifacts-1.18.2-4.1.0.jar%2359!/:1.18.2-4.1.0] {re:classloading}
at artifacts.common.entity.MimicEntity.m_6469_(MimicEntity.java:157) ~[artifacts-1.18.2-4.1.0.jar%2359!/:1.18.2-4.1.0] {re:classloading}
at net.minecraft.world.entity.player.Player.m_5706_(Player.java:1126) ~[client-1.18.2-20220404.173914-srg.jar%23140!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mca.mixin.json:MixinPlayerEntity,pl:mixin:APP:byg.mixins.json:common.entity.MixinPlayer,pl:mixin:APP:expandability.mixins.json:swimming.PlayerMixin,pl:mixin:A}
at net.minecraft.client.multiplayer.MultiPlayerGameMode.m_105223_(MultiPlayerGameMode.java:360) ~[client-1.18.2-20220404.173914-srg.jar%23140!/:?] {re:mixin,pl:runtimedistcleaner:A,re:classloading,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.m_202354_(Minecraft.java:1504) ~[client-1.18.2-20220404.173914-srg.jar%23140!/:?] {re:mixin,pl:accesstransformer:B,xf:fml:customskinloader:MinecraftTransformer,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,xf:fml:customskinloader:MinecraftTransformer,pl:mixin:APP:rubidium.mixins.json:core.MixinMinecraftClient,pl:mixin:APP:balm.mixins.json:MinecraftMixin,pl:mixin:APP:iceberg.mixins.json:MinecraftMixin,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_Keybinds,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_PipelineManagement,pl:mixin:APP:architectury.mixins.json:MixinMinecraft,pl:mixin:APP:byg_forge.mixins.json:client.MixinMinecraft,pl:mixin:APP:securitycraft.mixins.json:camera.MinecraftMixin,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.m_91279_(Minecraft.java:1849) ~[client-1.18.2-20220404.173914-srg.jar%23140!/:?] {re:mixin,pl:accesstransformer:B,xf:fml:customskinloader:MinecraftTransformer,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,xf:fml:customskinloader:MinecraftTransformer,pl:mixin:APP:rubidium.mixins.json:core.MixinMinecraftClient,pl:mixin:APP:balm.mixins.json:MinecraftMixin,pl:mixin:APP:iceberg.mixins.json:MinecraftMixin,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_Keybinds,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_PipelineManagement,pl:mixin:APP:architectury.mixins.json:MixinMinecraft,pl:mixin:APP:byg_forge.mixins.json:client.MixinMinecraft,pl:mixin:APP:securitycraft.mixins.json:camera.MinecraftMixin,pl:mixin:A,pl:runtimedistcleaner:A}
-- Affected level --
Details:
All players: 1 total; [LocalPlayer['Michelan6elo'/3225, l='ClientLevel', x=314.62, y=64.00, z=302.49]]
Chunk stats: 1024, 475
Level dimension: minecraft:overworld
Level spawn location: World: (170,68,120), Section: (at 10,4,8 in 10,4,7; chunk contains blocks 160,-64,112 to 175,319,127), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,-64,0 to 511,319,511)
Level time: 41449258 game time, 211102 day time
Server brand: forge
Server type: Non-integrated multiplayer server
Stacktrace:
at net.minecraft.client.multiplayer.ClientLevel.m_6026_(ClientLevel.java:407) ~[client-1.18.2-20220404.173914-srg.jar%23140!/:?] {re:mixin,pl:runtimedistcleaner:A,re:classloading,pl:mixin:APP:rubidium.mixins.json:features.chunk_rendering.MixinClientWorld,pl:mixin:APP:rubidium.mixins.json:features.fast_biome_colors.MixinClientWorld,pl:mixin:APP:mixins.oculus.vertexformat.json:block_rendering.MixinClientLevel,pl:mixin:APP:architectury.mixins.json:MixinClientLevel,pl:mixin:APP:byg.mixins.json:access.client.ClientLevelAccess,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.m_91354_(Minecraft.java:2262) ~[client-1.18.2-20220404.173914-srg.jar%23140!/:?] {re:mixin,pl:accesstransformer:B,xf:fml:customskinloader:MinecraftTransformer,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,xf:fml:customskinloader:MinecraftTransformer,pl:mixin:APP:rubidium.mixins.json:core.MixinMinecraftClient,pl:mixin:APP:balm.mixins.json:MinecraftMixin,pl:mixin:APP:iceberg.mixins.json:MinecraftMixin,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_Keybinds,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_PipelineManagement,pl:mixin:APP:architectury.mixins.json:MixinMinecraft,pl:mixin:APP:byg_forge.mixins.json:client.MixinMinecraft,pl:mixin:APP:securitycraft.mixins.json:camera.MinecraftMixin,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.m_91374_(Minecraft.java:687) ~[client-1.18.2-20220404.173914-srg.jar%23140!/:?] {re:mixin,pl:accesstransformer:B,xf:fml:customskinloader:MinecraftTransformer,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,xf:fml:customskinloader:MinecraftTransformer,pl:mixin:APP:rubidium.mixins.json:core.MixinMinecraftClient,pl:mixin:APP:balm.mixins.json:MinecraftMixin,pl:mixin:APP:iceberg.mixins.json:MinecraftMixin,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_Keybinds,pl:mixin:APP:mixins.oculus.json:MixinMinecraft_PipelineManagement,pl:mixin:APP:architectury.mixins.json:MixinMinecraft,pl:mixin:APP:byg_forge.mixins.json:client.MixinMinecraft,pl:mixin:APP:securitycraft.mixins.json:camera.MinecraftMixin,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.main.Main.main(Main.java:205) ~[client-1.18.2-20220404.173914-srg.jar%23140!/:?] {re:classloading,pl:runtimedistcleaner:A}
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {}
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?] {}
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {}
at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?] {}
at net.minecraftforge.fml.loading.targets.CommonClientLaunchHandler.lambda$launchService$0(CommonClientLaunchHandler.java:31) ~[fmlloader-1.18.2-40.1.76.jar%2317!/:?] {}
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-9.1.3.jar%235!/:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53) [modlauncher-9.1.3.jar%235!/:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71) [modlauncher-9.1.3.jar%235!/:?] {}
at cpw.mods.modlauncher.Launcher.run(Launcher.java:106) [modlauncher-9.1.3.jar%235!/:?] {}
at cpw.mods.modlauncher.Launcher.main(Launcher.java:77) [modlauncher-9.1.3.jar%235!/:?] {}
at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26) [modlauncher-9.1.3.jar%235!/:?] {}
at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23) [modlauncher-9.1.3.jar%235!/:?] {}
at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:149) [bootstraplauncher-1.0.0.jar:?] {}

Seems to be an issue with Budschie's Morph Mod, it has already been reported there. You'll have to uninstall it or avoid mimics until it updates.