Describe the bug
java.lang.IllegalArgumentException: No serializer found for class com.comphenix.protocol.wrappers.nbt.WrappedCompound

To Reproduce
Steps to reproduce the behavior:
I don't know

Expected behavior
No console error

Version Info

paperspigot 1518 (1.12.2)

LibsDisguises 9.5.2
ProtocolLib : 4.4.0 (Other version get error for another, more freq.)

https://pastebin.com/72fWjZBG

Provide your ProtocolLib install info with /protocol dump through pastebin.
[19:54:01] [Server thread/WARN]: java.lang.IllegalArgumentException: No serializer found for class com.comphenix.protocol.wrappers.nbt.WrappedCompound
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.wrappers.WrappedDataWatcher$Registry.get(WrappedDataWatcher.java:940)
[19:54:01] [Server thread/WARN]: at me.libraryaddict.disguise.utilities.PacketsManager.createDataWatcher(PacketsManager.java:504)
[19:54:01] [Server thread/WARN]: at me.libraryaddict.disguise.utilities.PacketsManager.constructSpawnPackets(PacketsManager.java:366)
[19:54:01] [Server thread/WARN]: at me.libraryaddict.disguise.utilities.PacketsManager.transformPacket(PacketsManager.java:918)
[19:54:01] [Server thread/WARN]: at me.libraryaddict.disguise.utilities.packetlisteners.PacketListenerMain.onPacketSending(PacketListenerMain.java:57)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.SortedPacketListenerList.invokeSendingListener(SortedPacketListenerList.java:195)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.SortedPacketListenerList.invokePacketSending(SortedPacketListenerList.java:149)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.PacketFilterManager.handlePacket(PacketFilterManager.java:588)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.PacketFilterManager.invokePacketSending(PacketFilterManager.java:564)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ProtocolInjector.packetQueued(ProtocolInjector.java:338)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ProtocolInjector.onPacketSending(ProtocolInjector.java:298)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelInjector.processSending(ChannelInjector.java:367)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelInjector.access$800(ChannelInjector.java:66)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelInjector$3.handleScheduled(ChannelInjector.java:332)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelInjector$3.onMessageScheduled(ChannelInjector.java:302)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelProxy$2.schedulingRunnable(ChannelProxy.java:127)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.EventLoopProxy.execute(EventLoopProxy.java:95)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.NetworkManager.a(NetworkManager.java:209)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.NetworkManager.sendPacket(NetworkManager.java:157)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerConnection.sendPacket(PlayerConnection.java:1203)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTrackerEntry.updatePlayer(EntityTrackerEntry.java:369)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTrackerEntry.scanPlayers(EntityTrackerEntry.java:516)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTracker.addEntity(EntityTracker.java:119)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTracker.addEntity(EntityTracker.java:104)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTracker.track(EntityTracker.java:30)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.WorldManager.a(WorldManager.java:21)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.World.b(World.java:1219)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.WorldServer.b(WorldServer.java:1207)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.World.addEntity(World.java:1212)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.WorldServer.addEntity(WorldServer.java:1145)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.World.addEntity(World.java:1115)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerList.moveToWorld(PlayerList.java:729)
[19:54:01] [Server thread/WARN]: at org.bukkit.craftbukkit.v1_12_R1.entity.CraftPlayer.teleport(CraftPlayer.java:655)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Teleport.now(Teleport.java:127)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Teleport.teleport(Teleport.java:198)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Teleport.back(Teleport.java:264)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.commands.Commandback.run(Commandback.java:25)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.commands.EssentialsCommand.run(EssentialsCommand.java:157)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Essentials.onCommandEssentials(Essentials.java:517)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Essentials.onCommand(Essentials.java:430)
[19:54:01] [Server thread/WARN]: at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
[19:54:01] [Server thread/WARN]: at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:152)
[19:54:01] [Server thread/WARN]: at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:685)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1492)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1297)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:5)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:14)
[19:54:01] [Server thread/WARN]: at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
[19:54:01] [Server thread/WARN]: at java.util.concurrent.FutureTask.run(Unknown Source)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:850)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:423)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:774)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:666)
[19:54:01] [Server thread/WARN]: at java.lang.Thread.run(Unknown Source)
[19:54:01] [Server thread/WARN]: java.lang.IllegalArgumentException: No serializer found for class com.comphenix.protocol.wrappers.nbt.WrappedCompound
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.wrappers.WrappedDataWatcher$Registry.get(WrappedDataWatcher.java:940)
[19:54:01] [Server thread/WARN]: at me.libraryaddict.disguise.utilities.PacketsManager.createDataWatcher(PacketsManager.java:504)
[19:54:01] [Server thread/WARN]: at me.libraryaddict.disguise.utilities.PacketsManager.constructSpawnPackets(PacketsManager.java:366)
[19:54:01] [Server thread/WARN]: at me.libraryaddict.disguise.utilities.PacketsManager.transformPacket(PacketsManager.java:918)
[19:54:01] [Server thread/WARN]: at me.libraryaddict.disguise.utilities.packetlisteners.PacketListenerMain.onPacketSending(PacketListenerMain.java:57)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.SortedPacketListenerList.invokeSendingListener(SortedPacketListenerList.java:195)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.SortedPacketListenerList.invokePacketSending(SortedPacketListenerList.java:149)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.PacketFilterManager.handlePacket(PacketFilterManager.java:588)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.PacketFilterManager.invokePacketSending(PacketFilterManager.java:564)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ProtocolInjector.packetQueued(ProtocolInjector.java:338)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ProtocolInjector.onPacketSending(ProtocolInjector.java:298)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelInjector.processSending(ChannelInjector.java:367)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelInjector.access$800(ChannelInjector.java:66)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelInjector$3.handleScheduled(ChannelInjector.java:332)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelInjector$3.onMessageScheduled(ChannelInjector.java:302)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelProxy$2.schedulingRunnable(ChannelProxy.java:127)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.EventLoopProxy.execute(EventLoopProxy.java:95)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.NetworkManager.a(NetworkManager.java:209)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.NetworkManager.sendPacket(NetworkManager.java:157)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerConnection.sendPacket(PlayerConnection.java:1203)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTrackerEntry.updatePlayer(EntityTrackerEntry.java:369)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTrackerEntry.scanPlayers(EntityTrackerEntry.java:516)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTracker.addEntity(EntityTracker.java:119)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTracker.addEntity(EntityTracker.java:104)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTracker.track(EntityTracker.java:30)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.WorldManager.a(WorldManager.java:21)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.World.b(World.java:1219)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.WorldServer.b(WorldServer.java:1207)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.World.addEntity(World.java:1212)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.WorldServer.addEntity(WorldServer.java:1145)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.World.addEntity(World.java:1115)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerList.moveToWorld(PlayerList.java:729)
[19:54:01] [Server thread/WARN]: at org.bukkit.craftbukkit.v1_12_R1.entity.CraftPlayer.teleport(CraftPlayer.java:655)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Teleport.now(Teleport.java:127)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Teleport.teleport(Teleport.java:198)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Teleport.back(Teleport.java:264)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.commands.Commandback.run(Commandback.java:25)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.commands.EssentialsCommand.run(EssentialsCommand.java:157)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Essentials.onCommandEssentials(Essentials.java:517)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Essentials.onCommand(Essentials.java:430)
[19:54:01] [Server thread/WARN]: at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
[19:54:01] [Server thread/WARN]: at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:152)
[19:54:01] [Server thread/WARN]: at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:685)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1492)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1297)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:5)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:14)
[19:54:01] [Server thread/WARN]: at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
[19:54:01] [Server thread/WARN]: at java.util.concurrent.FutureTask.run(Unknown Source)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:850)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:423)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:774)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:666)
[19:54:01] [Server thread/WARN]: at java.lang.Thread.run(Unknown Source)
[19:54:01] [Server thread/WARN]: java.lang.IllegalArgumentException: No serializer found for class com.comphenix.protocol.wrappers.nbt.WrappedCompound
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.wrappers.WrappedDataWatcher$Registry.get(WrappedDataWatcher.java:940)
[19:54:01] [Server thread/WARN]: at me.libraryaddict.disguise.utilities.PacketsManager.createDataWatcher(PacketsManager.java:504)
[19:54:01] [Server thread/WARN]: at me.libraryaddict.disguise.utilities.PacketsManager.constructSpawnPackets(PacketsManager.java:366)
[19:54:01] [Server thread/WARN]: at me.libraryaddict.disguise.utilities.PacketsManager.transformPacket(PacketsManager.java:918)
[19:54:01] [Server thread/WARN]: at me.libraryaddict.disguise.utilities.packetlisteners.PacketListenerMain.onPacketSending(PacketListenerMain.java:57)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.SortedPacketListenerList.invokeSendingListener(SortedPacketListenerList.java:195)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.SortedPacketListenerList.invokePacketSending(SortedPacketListenerList.java:149)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.PacketFilterManager.handlePacket(PacketFilterManager.java:588)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.PacketFilterManager.invokePacketSending(PacketFilterManager.java:564)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ProtocolInjector.packetQueued(ProtocolInjector.java:338)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ProtocolInjector.onPacketSending(ProtocolInjector.java:298)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelInjector.processSending(ChannelInjector.java:367)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelInjector.access$800(ChannelInjector.java:66)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelInjector$3.handleScheduled(ChannelInjector.java:332)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelInjector$3.onMessageScheduled(ChannelInjector.java:302)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelProxy$2.schedulingRunnable(ChannelProxy.java:127)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.EventLoopProxy.execute(EventLoopProxy.java:95)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.NetworkManager.a(NetworkManager.java:209)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.NetworkManager.sendPacket(NetworkManager.java:157)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerConnection.sendPacket(PlayerConnection.java:1203)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTrackerEntry.updatePlayer(EntityTrackerEntry.java:369)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTrackerEntry.scanPlayers(EntityTrackerEntry.java:516)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTracker.addEntity(EntityTracker.java:119)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTracker.addEntity(EntityTracker.java:104)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTracker.track(EntityTracker.java:30)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.WorldManager.a(WorldManager.java:21)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.World.b(World.java:1219)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.WorldServer.b(WorldServer.java:1207)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.World.addEntity(World.java:1212)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.WorldServer.addEntity(WorldServer.java:1145)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.World.addEntity(World.java:1115)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerList.moveToWorld(PlayerList.java:729)
[19:54:01] [Server thread/WARN]: at org.bukkit.craftbukkit.v1_12_R1.entity.CraftPlayer.teleport(CraftPlayer.java:655)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Teleport.now(Teleport.java:127)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Teleport.teleport(Teleport.java:198)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Teleport.back(Teleport.java:264)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.commands.Commandback.run(Commandback.java:25)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.commands.EssentialsCommand.run(EssentialsCommand.java:157)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Essentials.onCommandEssentials(Essentials.java:517)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Essentials.onCommand(Essentials.java:430)
[19:54:01] [Server thread/WARN]: at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
[19:54:01] [Server thread/WARN]: at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:152)
[19:54:01] [Server thread/WARN]: at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:685)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1492)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1297)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:5)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:14)
[19:54:01] [Server thread/WARN]: at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
[19:54:01] [Server thread/WARN]: at java.util.concurrent.FutureTask.run(Unknown Source)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:850)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:423)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:774)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:666)
[19:54:01] [Server thread/WARN]: at java.lang.Thread.run(Unknown Source)
[19:54:01] [Server thread/WARN]: java.lang.IllegalArgumentException: No serializer found for class com.comphenix.protocol.wrappers.nbt.WrappedCompound
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.wrappers.WrappedDataWatcher$Registry.get(WrappedDataWatcher.java:940)
[19:54:01] [Server thread/WARN]: at me.libraryaddict.disguise.utilities.PacketsManager.createDataWatcher(PacketsManager.java:504)
[19:54:01] [Server thread/WARN]: at me.libraryaddict.disguise.utilities.PacketsManager.constructSpawnPackets(PacketsManager.java:366)
[19:54:01] [Server thread/WARN]: at me.libraryaddict.disguise.utilities.PacketsManager.transformPacket(PacketsManager.java:918)
[19:54:01] [Server thread/WARN]: at me.libraryaddict.disguise.utilities.packetlisteners.PacketListenerMain.onPacketSending(PacketListenerMain.java:57)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.SortedPacketListenerList.invokeSendingListener(SortedPacketListenerList.java:195)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.SortedPacketListenerList.invokePacketSending(SortedPacketListenerList.java:149)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.PacketFilterManager.handlePacket(PacketFilterManager.java:588)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.PacketFilterManager.invokePacketSending(PacketFilterManager.java:564)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ProtocolInjector.packetQueued(ProtocolInjector.java:338)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ProtocolInjector.onPacketSending(ProtocolInjector.java:298)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelInjector.processSending(ChannelInjector.java:367)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelInjector.access$800(ChannelInjector.java:66)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelInjector$3.handleScheduled(ChannelInjector.java:332)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelInjector$3.onMessageScheduled(ChannelInjector.java:302)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.ChannelProxy$2.schedulingRunnable(ChannelProxy.java:127)
[19:54:01] [Server thread/WARN]: at com.comphenix.protocol.injector.netty.EventLoopProxy.execute(EventLoopProxy.java:95)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.NetworkManager.a(NetworkManager.java:209)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.NetworkManager.sendPacket(NetworkManager.java:157)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerConnection.sendPacket(PlayerConnection.java:1203)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTrackerEntry.updatePlayer(EntityTrackerEntry.java:369)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTrackerEntry.scanPlayers(EntityTrackerEntry.java:516)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTracker.addEntity(EntityTracker.java:119)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTracker.addEntity(EntityTracker.java:104)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.EntityTracker.track(EntityTracker.java:30)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.WorldManager.a(WorldManager.java:21)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.World.b(World.java:1219)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.WorldServer.b(WorldServer.java:1207)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.World.addEntity(World.java:1212)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.WorldServer.addEntity(WorldServer.java:1145)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.World.addEntity(World.java:1115)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerList.moveToWorld(PlayerList.java:729)
[19:54:01] [Server thread/WARN]: at org.bukkit.craftbukkit.v1_12_R1.entity.CraftPlayer.teleport(CraftPlayer.java:655)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Teleport.now(Teleport.java:127)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Teleport.teleport(Teleport.java:198)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Teleport.back(Teleport.java:264)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.commands.Commandback.run(Commandback.java:25)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.commands.EssentialsCommand.run(EssentialsCommand.java:157)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Essentials.onCommandEssentials(Essentials.java:517)
[19:54:01] [Server thread/WARN]: at com.earth2me.essentials.Essentials.onCommand(Essentials.java:430)
[19:54:01] [Server thread/WARN]: at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
[19:54:01] [Server thread/WARN]: at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:152)
[19:54:01] [Server thread/WARN]: at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:685)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1492)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1297)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:5)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:14)
[19:54:01] [Server thread/WARN]: at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
[19:54:01] [Server thread/WARN]: at java.util.concurrent.FutureTask.run(Unknown Source)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:850)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:423)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:774)
[19:54:01] [Server thread/WARN]: at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:666)
[19:54:01] [Server thread/WARN]: at java.lang.Thread.run(Unknown Source)

Make sure you're using the right LibsDisguises version for your server.