Index: 18
        Listeners:
                0: HIGHEST
                1: ASM: class com.nyfaria.endlessocean.event.CommonForgeEvents onPlayerTick(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
                2: HIGH
                3: ASM: class dev.architectury.event.forge.EventHandlerImplCommon event(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
                4: NORMAL
                5: ASM: class net.mcreator.piglinexpansion.procedures.LOLProcedure onPlayerTick(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
                6: ASM: se.mickelus.tetra.effect.ItemEffectHandler@54e5528c onPlayerTick(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
                7: ASM: class com.mrcrayfish.guns.common.ReloadTracker onPlayerTick(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
                8: net.minecraftforge.eventbus.EventBus$$Lambda$4340/0x000000080170da50@66dfe917
                9: ASM: class net.mrscauthd.beyond_earth.events.Events playerTick(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
                10: ASM: class net.mcreator.piglinking.procedures.ANUFKProProcedure onPlayerTick(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
                11: net.minecraftforge.eventbus.EventBus$$Lambda$4340/0x000000080170da50@3c4b4551
                12: ASM: class dev.momostudios.coldsweat.common.event.StopSnowDamage playerFreezingTick(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
                13: ASM: class dev.momostudios.coldsweat.common.event.ArmorInsulation addLeatherModifiers(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
                14: ASM: class dev.momostudios.coldsweat.common.event.AddTempModifiers playerRiding(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
                15: ASM: class dev.momostudios.coldsweat.common.event.AddTempModifiers onPlayerTick(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
                16: ASM: class dev.momostudios.coldsweat.common.capability.PlayerTempManager onPlayerTick(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
                17: ASM: class com.simibubi.create.content.curiosities.bell.HauntedBellPulser hauntedBellCreatesPulse(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
                18: ASM: com.baranhan123.undefeatables.handlers.TickHandler@24a6d029 searchMobsAndApply(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
                19: ASM: class dev.momostudios.coldsweat.core.event.TaskScheduler runScheduledTasks(Lnet/minecraftforge/event/TickEvent;)V
                20: LOW
                21: ASM: se.mickelus.tetra.items.forged.VibrationDebuffer@7bb24c83 onPlayerTick(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
                22: ASM: se.mickelus.tetra.items.modular.impl.toolbelt.booster.TickHandlerBooster@386b0d17 onPlayerTick(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
java.lang.RuntimeException: Attempted to load class net/minecraft/client/player/LocalPlayer for invalid dist DEDICATED_SERVER
        at MC-BOOTSTRAP/[email protected]/net.minecraftforge.fml.loading.RuntimeDistCleaner.processClassWithFlags(RuntimeDistCleaner.java:57)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchPluginHandler.offerClassNodeToPlugins(LaunchPluginHandler.java:88)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:120)
        at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.TransformingClassLoader.maybeTransformClassBytes(TransformingClassLoader.java:50)
        at [email protected]/cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:110)
        at [email protected]/cpw.mods.cl.ModuleClassLoader.lambda$findClass$16(ModuleClassLoader.java:216)
        at [email protected]/cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:226)
        at [email protected]/cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:216)
        at [email protected]/cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:132)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
        at TRANSFORMER/[email protected]/com.baranhan123.undefeatables.handlers.TickHandler.searchMobsAndApply(TickHandler.java:28)
        at net.minecraftforge.eventbus.ASMEventHandler_557_TickHandler_searchMobsAndApply_PlayerTickEvent.invoke(.dynamic)
        at MC-BOOTSTRAP/[email protected]/net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:85)
        at MC-BOOTSTRAP/[email protected]/net.minecraftforge.eventbus.EventBus.post(EventBus.java:302)
        at MC-BOOTSTRAP/[email protected]/net.minecraftforge.eventbus.EventBus.post(EventBus.java:283)
        at TRANSFORMER/[email protected]/net.minecraftforge.event.ForgeEventFactory.onPlayerPreTick(ForgeEventFactory.java:874)
        at TRANSFORMER/[email protected]/net.minecraft.world.entity.player.Player.m_8119_(Player.java:208)
        at TRANSFORMER/[email protected]/net.minecraft.server.level.ServerPlayer.m_9240_(ServerPlayer.java:439)
        at TRANSFORMER/[email protected]/net.minecraft.server.network.ServerGamePacketListenerImpl.m_9933_(ServerGamePacketListenerImpl.java:207)
        at TRANSFORMER/[email protected]/net.minecraft.network.Connection.m_129483_(Connection.java:245)
        at TRANSFORMER/[email protected]/net.minecraft.server.network.ServerConnectionListener.m_9721_(ServerConnectionListener.java:143)
        at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.m_5703_(MinecraftServer.java:916)
        at TRANSFORMER/[email protected]/net.minecraft.server.dedicated.DedicatedServer.m_5703_(DedicatedServer.java:326)
        at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.m_5705_(MinecraftServer.java:842)
        at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:685)
        at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.m_177918_(MinecraftServer.java:261)
        at java.base/java.lang.Thread.run(Thread.java:833)
[12:41:09] [Server thread/WARN] [minecraft/ServerConnectionListener]: Failed to handle packet for /116.86.192.215:60070
net.minecraft.ReportedException: Ticking player
        at net.minecraft.server.level.ServerPlayer.m_9240_(ServerPlayer.java:502) ~[server-1.18.2-20220404.173914-srg.jar%23122!/:?] {re:computing_frames,pl:accesstransformer:B,re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
        at net.minecraft.server.network.ServerGamePacketListenerImpl.m_9933_(ServerGamePacketListenerImpl.java:207) ~[server-1.18.2-20220404.173914-srg.jar%23122!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:tetra.mixins.json:MixinServerPlayNetHandler,pl:mixin:APP:forge-mca.mixin.json:MixinServerPlayNetworkHandler,pl:mixin:A}
        at net.minecraft.network.Connection.m_129483_(Connection.java:245) ~[server-1.18.2-20220404.173914-srg.jar%23122!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
        at net.minecraft.server.network.ServerConnectionListener.m_9721_(ServerConnectionListener.java:143) ~[server-1.18.2-20220404.173914-srg.jar%23122!/:?] {re:classloading}
        at net.minecraft.server.MinecraftServer.m_5703_(MinecraftServer.java:916) ~[server-1.18.2-20220404.173914-srg.jar%23122!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:tetrapak.mixins.json:accessor.MinecraftServerAccessor,pl:mixin:APP:crafttweaker.mixins.json:common.access.server.AccessMinecraftServer,pl:mixin:A}
        at net.minecraft.server.dedicated.DedicatedServer.m_5703_(DedicatedServer.java:326) ~[server-1.18.2-20220404.173914-srg.jar%23122!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:blueprint.mixins.json:DedicatedServerMixin,pl:mixin:A}
        at net.minecraft.server.MinecraftServer.m_5705_(MinecraftServer.java:842) ~[server-1.18.2-20220404.173914-srg.jar%23122!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:tetrapak.mixins.json:accessor.MinecraftServerAccessor,pl:mixin:APP:crafttweaker.mixins.json:common.access.server.AccessMinecraftServer,pl:mixin:A}
        at net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:685) ~[server-1.18.2-20220404.173914-srg.jar%23122!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:tetrapak.mixins.json:accessor.MinecraftServerAccessor,pl:mixin:APP:crafttweaker.mixins.json:common.access.server.AccessMinecraftServer,pl:mixin:A}
        at net.minecraft.server.MinecraftServer.m_177918_(MinecraftServer.java:261) ~[server-1.18.2-20220404.173914-srg.jar%23122!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:tetrapak.mixins.json:accessor.MinecraftServerAccessor,pl:mixin:APP:crafttweaker.mixins.json:common.access.server.AccessMinecraftServer,pl:mixin:A}
        at java.lang.Thread.run(Thread.java:833) [?:?] {}
Caused by: java.lang.RuntimeException: Attempted to load class net/minecraft/client/player/LocalPlayer for invalid dist DEDICATED_SERVER
        at net.minecraftforge.fml.loading.RuntimeDistCleaner.processClassWithFlags(RuntimeDistCleaner.java:57) ~[fmlloader-1.18.2-40.2.0.jar%2317!/:1.0] {}
        at cpw.mods.modlauncher.LaunchPluginHandler.offerClassNodeToPlugins(LaunchPluginHandler.java:88) ~[modlauncher-9.1.3.jar%235!/:?] {}
        at cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:120) ~[modlauncher-9.1.3.jar%235!/:?] {}
        at cpw.mods.modlauncher.TransformingClassLoader.maybeTransformClassBytes(TransformingClassLoader.java:50) ~[modlauncher-9.1.3.jar%235!/:?] {}
        at cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:110) ~[securejarhandler-1.0.3.jar:?] {}
        at cpw.mods.cl.ModuleClassLoader.lambda$findClass$16(ModuleClassLoader.java:216) ~[securejarhandler-1.0.3.jar:?] {}
        at cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:226) ~[securejarhandler-1.0.3.jar:?] {}
        at cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:216) ~[securejarhandler-1.0.3.jar:?] {}
        at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:132) ~[securejarhandler-1.0.3.jar:?] {}
        at java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[?:?] {}
        at com.baranhan123.undefeatables.handlers.TickHandler.searchMobsAndApply(TickHandler.java:28) ~[Undefeatables%201.7.jar%23117!/:1.6] {re:classloading}
        at net.minecraftforge.eventbus.ASMEventHandler_557_TickHandler_searchMobsAndApply_PlayerTickEvent.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.event.ForgeEventFactory.onPlayerPreTick(ForgeEventFactory.java:874) ~[forge-1.18.2-40.2.0-universal.jar%23127!/:?] {re:classloading,pl:runtimedistcleaner:A}
        at net.minecraft.world.entity.player.Player.m_8119_(Player.java:208) ~[server-1.18.2-20220404.173914-srg.jar%23122!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:tetra.mixins.json:MixinPlayerEntity,pl:mixin:APP:bigbrain.mixins.json:PlayerEntityMixin,pl:mixin:APP:forge-mca.mixin.json:MixinPlayerEntity,pl:mixin:A}
        at net.minecraft.server.level.ServerPlayer.m_9240_(ServerPlayer.java:439) ~[server-1.18.2-20220404.173914-srg.jar%23122!/:?] {re:computing_frames,pl:accesstransformer:B,re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
        ... 9 more
[12:41:09] [Server thread/FATAL] [ne.mi.fm.lo.RuntimeDistCleaner/DISTXFORM]: Attempted to load class net/minecraft/client/player/LocalPlayer for invalid dist DEDICATED_SERVER
[12:41:09] [Server thread/ERROR] [ne.mi.ev.EventBus/EVENTBUS]: Exception caught during firing event: Attempted to load class net/minecraft/client/player/LocalPlayer for invalid dist DEDICATED_SERVER

 

this was the error message i got when i attempted to join

Quote

java.lang.RuntimeException: Attempted to load class net/minecraft/client/player/LocalPlayer for invalid dist DEDICATED_SERVER

        at TRANSFORMER/[email protected]/com.baranhan123.undefeatables.handlers.TickHandler.searchMobsAndApply(TickHandler.java:28)

The undefeatables mod is trying to load client only classes on the server.

Check you have the latest version then contact the mod author.