When you try to urinate on a server the client is kicked and it says "Internal server error", and the console says:

[22:27:06] [Server thread/ERROR] [ne.mi.ev.EventBus/EVENTBUS]: Exception caught during firing event: Attempted to load class net/minecraft/client/multiplayer/ClientLevel for invalid dist DEDICATED_SERVER
Index: 4
Listeners:
0: HIGH
1: ASM: class dev.architectury.event.forge.EventHandlerImplCommon event(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
2: NORMAL
3: ASM: se.mickelus.tetra.effect.ItemEffectHandler@265a9b90 onPlayerTick(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
4: ASM: class com.petrolpark.destroy.events.DestroyCommonEvents playerTick(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
5: ASM: class com.simibubi.create.content.equipment.bell.HauntedBellPulser hauntedBellCreatesPulse(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
6: LOW
7: ASM: se.mickelus.tetra.items.forged.VibrationDebuffer@78f0a920 onPlayerTick(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
8: ASM: se.mickelus.tetra.items.modular.impl.toolbelt.booster.TickHandlerBooster@6a9e8375 onPlayerTick(Lnet/minecraftforge/event/TickEvent$PlayerTickEvent;)V
java.lang.RuntimeException: Attempted to load class net/minecraft/client/multiplayer/ClientLevel 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 cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:113)
at cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.lambda$findClass$15(ModuleClassLoader.java:219)
at cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:229)
at cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:219)
at cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:135)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
at TRANSFORMER/[email protected]/com.petrolpark.destroy.events.DestroyCommonEvents.playerTick(DestroyCommonEvents.java:348)
at TRANSFORMER/[email protected]/com.petrolpark.destroy.events.DestroyCommonEvents_playerTick_PlayerTickEvent.invoke(.dynamic)
at MC-BOOTSTRAP/net.minecraftforge.eventbus/net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:73)
at MC-BOOTSTRAP/net.minecraftforge.eventbus/net.minecraftforge.eventbus.EventBus.post(EventBus.java:315)
at MC-BOOTSTRAP/net.minecraftforge.eventbus/net.minecraftforge.eventbus.EventBus.post(EventBus.java:296)
at TRANSFORMER/[email protected]/net.minecraftforge.event.ForgeEventFactory.onPlayerPostTick(ForgeEventFactory.java:920)
at TRANSFORMER/[email protected]/net.minecraft.world.entity.player.Player.m_8119(Player.java:285)
at TRANSFORMER/[email protected]/net.minecraft.server.level.ServerPlayer.m_9240(ServerPlayer.java:467)
at TRANSFORMER/[email protected]/net.minecraft.server.network.ServerGamePacketListenerImpl.m_9933_(ServerGamePacketListenerImpl.java:262)
at TRANSFORMER/[email protected]/net.minecraft.network.Connection.m_129483_(Connection.java:263)
at TRANSFORMER/[email protected]/net.minecraft.server.network.ServerConnectionListener.m_9721_(ServerConnectionListener.java:142)
at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.m_5703_(MinecraftServer.java:907)
at TRANSFORMER/[email protected]/net.minecraft.server.dedicated.DedicatedServer.m_5703_(DedicatedServer.java:283)
at TRANSFORMER/[email protected]/net.minecraft.server.MinecraftServer.m_5705_(MinecraftServer.java:814)
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(Thread.java:1589)

[22:27:06] [Server thread/WARN] [minecraft/ServerConnectionListener]: Failed to handle packet for /24.25.208.193:49731
net.minecraft.ReportedException: Ticking player
at net.minecraft.server.level.ServerPlayer.m_9240_(ServerPlayer.java:530) ~[server-1.20.1-20230612.114412-srg.jar%23125!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:railways-common.mixins.json:conductor_possession.ServerPlayerMixin,pl:mixin:A}
at net.minecraft.server.network.ServerGamePacketListenerImpl.m_9933_(ServerGamePacketListenerImpl.java:262) ~[server-1.20.1-20230612.114412-srg.jar%23125!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:tetra.mixins.json:ServerPlayNetHandlerMixin,pl:mixin:APP:railways.mixins.json:ServerGamePacketListenerImplMixin,pl:mixin:A}
at net.minecraft.network.Connection.m_129483_(Connection.java:263) ~[server-1.20.1-20230612.114412-srg.jar%23125!/:?] {re:classloading}
at net.minecraft.server.network.ServerConnectionListener.m_9721_(ServerConnectionListener.java:142) ~[server-1.20.1-20230612.114412-srg.jar%23125!/:?] {re:classloading}
at net.minecraft.server.MinecraftServer.m_5703_(MinecraftServer.java:907) ~[server-1.20.1-20230612.114412-srg.jar%23125!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
at net.minecraft.server.dedicated.DedicatedServer.m_5703_(DedicatedServer.java:283) ~[server-1.20.1-20230612.114412-srg.jar%23125!/:?] {re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
at net.minecraft.server.MinecraftServer.m_5705_(MinecraftServer.java:814) ~[server-1.20.1-20230612.114412-srg.jar%23125!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
at net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:661) ~[server-1.20.1-20230612.114412-srg.jar%23125!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
at net.minecraft.server.MinecraftServer.m_206580_(MinecraftServer.java:251) ~[server-1.20.1-20230612.114412-srg.jar%23125!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
at java.lang.Thread.run(Thread.java:1589) ~[?:?] {}
Caused by: java.lang.RuntimeException: Attempted to load class net/minecraft/client/multiplayer/ClientLevel for invalid dist DEDICATED_SERVER
at net.minecraftforge.fml.loading.RuntimeDistCleaner.processClassWithFlags(RuntimeDistCleaner.java:57) ~[fmlloader-1.20.1-47.2.20.jar%2369!/:1.0] {}
at cpw.mods.modlauncher.LaunchPluginHandler.offerClassNodeToPlugins(LaunchPluginHandler.java:88) ~[modlauncher-10.0.9.jar%2355!/:?] {}
at cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:120) ~[modlauncher-10.0.9.jar%2355!/:?] {}
at cpw.mods.modlauncher.TransformingClassLoader.maybeTransformClassBytes(TransformingClassLoader.java:50) ~[modlauncher-10.0.9.jar%2355!/:?] {}
at cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:113) ~[securejarhandler-2.1.10.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.lambda$findClass$15(ModuleClassLoader.java:219) ~[securejarhandler-2.1.10.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:229) ~[securejarhandler-2.1.10.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:219) ~[securejarhandler-2.1.10.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:135) ~[securejarhandler-2.1.10.jar:?] {}
at java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[?:?] {}
at com.petrolpark.destroy.events.DestroyCommonEvents.playerTick(DestroyCommonEvents.java:348) ~[destroy-1.20.1-0.6.jar%23115!/:0.6] {re:classloading}
at com.petrolpark.destroy.events.DestroyCommonEvents_playerTick_PlayerTickEvent.invoke(.dynamic) ~[destroy-1.20.1-0.6.jar%23115!/:0.6] {re:classloading,pl:eventbus:B}
at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:73) ~[eventbus-6.0.5.jar%2352!/:?] {}
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:315) ~[eventbus-6.0.5.jar%2352!/:?] {}
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:296) ~[eventbus-6.0.5.jar%2352!/:?] {}
at net.minecraftforge.event.ForgeEventFactory.onPlayerPostTick(ForgeEventFactory.java:920) ~[forge-1.20.1-47.2.20-universal.jar%23130!/:?] {re:classloading}
at net.minecraft.world.entity.player.Player.m_8119(Player.java:285) ~[server-1.20.1-20230612.114412-srg.jar%23125!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:tetra.mixins.json:PlayerEntityMixin,pl:mixin:APP:railways-common.mixins.json:MixinPlayer,pl:mixin:APP:railways-common.mixins.json:PlayerEntityMixin,pl:mixin:A}
at net.minecraft.server.level.ServerPlayer.m_9240(ServerPlayer.java:467) ~[server-1.20.1-20230612.114412-srg.jar%23125!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:railways-common.mixins.json:conductor_possession.ServerPlayerMixin,pl:mixin:A}

Mod list:
Forge 47.2.20
FarmersDelight-1.20.1-1.2.3.jar
create-1.20.1-0.5.1.f.jar
architectury-9.1.12-forge.jar
cloth-config-11.1.118-forge.jar
destroy-1.20.1-0.6.jar
mutil-1.20.1-6.1.1.jar
tetra-1.20.1-6.1.0.jar
Steam_Rails-1.5.3+forge-mc1.20.1.jar
gravestone-1.20.1-1.0.10.jar
PuzzlesLib-v8.1.14-1.20.1-Forge.jar
EnchantingInfuser-v8.0.2-1.20.1-Forge.jar
tectonic-mod-1.19.3-v2.2.jar

Caused by: java.lang.RuntimeException: Attempted to load class net/minecraft/client/multiplayer/ClientLevel for invalid dist DEDICATED_SERVER at net.minecraftforge.fml.loading.RuntimeDistCleaner.processClassWithFlags(RuntimeDistCleaner.java:57) ~[fmlloader-1.20.1-47.2.20.jar%2369!/:1.0] at cpw.mods.modlauncher.LaunchPluginHandler.offerClassNodeToPlugins(LaunchPluginHandler.java:88) ~[modlauncher-10.0.9.jar%2355!/:?] at cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:120) ~[modlauncher-10.0.9.jar%2355!/:?] at cpw.mods.modlauncher.TransformingClassLoader.maybeTransformClassBytes(TransformingClassLoader.java:50) ~[modlauncher-10.0.9.jar%2355!/:?] at cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:113) ~[securejarhandler-2.1.10.jar:?] at cpw.mods.cl.ModuleClassLoader.lambda$findClass$15(ModuleClassLoader.java:219) ~[securejarhandler-2.1.10.jar:?] at cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:229) ~[securejarhandler-2.1.10.jar:?] at cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:219) ~[securejarhandler-2.1.10.jar:?] at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:135) ~[securejarhandler-2.1.10.jar:?] at java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[?:?] at com.petrolpark.destroy.events.DestroyCommonEvents.playerTick(DestroyCommonEvents.java:348) ~[destroy-1.20.1-0.6.jar%23328!/:0.6] at com.petrolpark.destroy.events.__DestroyCommonEvents_playerTick_PlayerTickEvent.invoke(.dynamic) ~[destroy-1.20.1-0.6.jar%23328!/:0.6] at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:73) ~[eventbus-6.0.5.jar%2352!/:?] at net.minecraftforge.eventbus.EventBus.post(EventBus.java:315) ~[eventbus-6.0.5.jar%2352!/:?] at net.minecraftforge.eventbus.EventBus.post(EventBus.java:296) ~[eventbus-6.0.5.jar%2352!/:?] at net.minecraftforge.event.ForgeEventFactory.onPlayerPostTick(ForgeEventFactory.java:920) ~[forge-1.20.1-47.2.20-universal.jar%23416!/:?] at net.minecraft.world.entity.player.Player.m_8119_(Player.java:285) ~[server-1.20.1-20230612.114412-srg.jar%23411!/:?] at net.minecraft.server.level.ServerPlayer.m_9240_(ServerPlayer.java:467) ~[server-1.20.1-20230612.114412-srg.jar%23411!/:?] ... 9 more [27Jan2024 08:34:25.195] [Server thread/INFO] [net.minecraft.server.network.ServerGamePacketListenerImpl/]: FaolonPlays lost connection: Internal server error [27Jan2024 08:34:25.195] [Server thread/INFO] [net.minecraft.server.MinecraftServer/]: FaolonPlays left the game

another class issue i think for this?

Fixed in 0.7.