Błędy w konsoli :c

Witam, co mogę zrobić, aby problemy, które wystepują ustąpiły? Zapycha mi to logi
Te błędy pojawiają się gdy zespawni się mob, który jest przemieniony, np:
 

Kosmita1:
  Type: ZOMBIE
  Display: '&aKosmita &6Lvl. 81'
  Health: 5000
  Damage: 20
  Disguise:
    Type: ENDERMAN
  Options:
    MovementSpeed: 0.3

A błędy:
 

[18:04:26] [Server thread/INFO]: KrzychQ issued server command: /mm mobs spawn Kosmita1
[18:04:26] [Server thread/WARN]: java.lang.IllegalArgumentException: No serializer found for class com.google.common.base.Absent
[18:04:26] [Server thread/WARN]: 	at com.comphenix.protocol.wrappers.WrappedDataWatcher$Registry.get(WrappedDataWatcher.java:940)
[18:04:26] [Server thread/WARN]: 	at me.libraryaddict.disguise.utilities.PacketsManager.createDataWatcher(PacketsManager.java:532)
[18:04:26] [Server thread/WARN]: 	at me.libraryaddict.disguise.utilities.PacketsManager.constructSpawnPackets(PacketsManager.java:455)
[18:04:26] [Server thread/WARN]: 	at me.libraryaddict.disguise.utilities.PacketsManager.transformPacket(PacketsManager.java:949)
[18:04:26] [Server thread/WARN]: 	at me.libraryaddict.disguise.utilities.packetlisteners.PacketListenerMain.onPacketSending(PacketListenerMain.java:61)
[18:04:26] [Server thread/WARN]: 	at com.comphenix.protocol.injector.SortedPacketListenerList.invokeSendingListener(SortedPacketListenerList.java:195)
[18:04:26] [Server thread/WARN]: 	at com.comphenix.protocol.injector.SortedPacketListenerList.invokePacketSending(SortedPacketListenerList.java:149)
[18:04:26] [Server thread/WARN]: 	at com.comphenix.protocol.injector.PacketFilterManager.handlePacket(PacketFilterManager.java:588)
[18:04:26] [Server thread/WARN]: 	at com.comphenix.protocol.injector.PacketFilterManager.invokePacketSending(PacketFilterManager.java:564)
[18:04:26] [Server thread/WARN]: 	at com.comphenix.protocol.injector.netty.ProtocolInjector.packetQueued(ProtocolInjector.java:338)
[18:04:26] [Server thread/WARN]: 	at com.comphenix.protocol.injector.netty.ProtocolInjector.onPacketSending(ProtocolInjector.java:298)
[18:04:26] [Server thread/WARN]: 	at com.comphenix.protocol.injector.netty.ChannelInjector.processSending(ChannelInjector.java:367)
[18:04:26] [Server thread/WARN]: 	at com.comphenix.protocol.injector.netty.ChannelInjector.access$800(ChannelInjector.java:66)
[18:04:26] [Server thread/WARN]: 	at com.comphenix.protocol.injector.netty.ChannelInjector$3.handleScheduled(ChannelInjector.java:332)
[18:04:26] [Server thread/WARN]: 	at com.comphenix.protocol.injector.netty.ChannelInjector$3.onMessageScheduled(ChannelInjector.java:302)
[18:04:26] [Server thread/WARN]: 	at com.comphenix.protocol.injector.netty.ChannelProxy$2.schedulingRunnable(ChannelProxy.java:127)
[18:04:26] [Server thread/WARN]: 	at com.comphenix.protocol.injector.netty.EventLoopProxy.execute(EventLoopProxy.java:95)
[18:04:26] [Server thread/WARN]: 	at net.minecraft.server.v1_12_R1.NetworkManager.a(NetworkManager.java:194)
[18:04:26] [Server thread/WARN]: 	at net.minecraft.server.v1_12_R1.NetworkManager.sendPacket(NetworkManager.java:143)
[18:04:26] [Server thread/WARN]: 	at net.minecraft.server.v1_12_R1.PlayerConnection.sendPacket(PlayerConnection.java:1140)
[18:04:26] [Server thread/WARN]: 	at net.minecraft.server.v1_12_R1.EntityTrackerEntry.updatePlayer(EntityTrackerEntry.java:344)
[18:04:26] [Server thread/WARN]: 	at net.minecraft.server.v1_12_R1.EntityTrackerEntry.scanPlayers(EntityTrackerEntry.java:449)
[18:04:26] [Server thread/WARN]: 	at net.minecraft.server.v1_12_R1.EntityTrackerEntry.track(EntityTrackerEntry.java:77)
[18:04:26] [Server thread/WARN]: 	at net.minecraft.server.v1_12_R1.EntityTracker.updatePlayers(EntityTracker.java:182)
[18:04:26] [Server thread/WARN]: 	at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:834)
[18:04:26] [Server thread/WARN]: 	at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406)
[18:04:26] [Server thread/WARN]: 	at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679)
[18:04:26] [Server thread/WARN]: 	at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577)
[18:04:26] [Server thread/WARN]: 	at java.lang.Thread.run(Thread.java:748)

Wersja spigota: 1.12.2
ProtocolLib: Najnowszy