Holographic display

Witam, w logach często wyskakują mi takowe błędy:
 

[21:26:33] [Server thread/ERROR]: [HolographicDisplays] Unhandled exception occured in onPacketSending(PacketEvent) for HolographicDisplays
java.lang.NoSuchMethodError: com.comphenix.protocol.wrappers.WrappedWatchableObject.deepClone()Lcom/comphenix/protocol/wrappers/WrappedWatchableObject;
	at com.gmail.filoghost.holographicdisplays.bridge.protocollib.ProtocolLibHook$1.onPacketSending(ProtocolLibHook.java:153) ~[HolographicDisplays.jar:?]
	at com.comphenix.protocol.injector.SortedPacketListenerList.invokeSendingListener(SortedPacketListenerList.java:195) [ProtocolLib.jar:4.2.1]
	at com.comphenix.protocol.injector.SortedPacketListenerList.invokePacketSending(SortedPacketListenerList.java:149) [ProtocolLib.jar:4.2.1]
	at com.comphenix.protocol.injector.PacketFilterManager.handlePacket(PacketFilterManager.java:608) [ProtocolLib.jar:4.2.1]
	at com.comphenix.protocol.injector.PacketFilterManager.invokePacketSending(PacketFilterManager.java:584) [ProtocolLib.jar:4.2.1]
	at com.comphenix.protocol.injector.netty.ProtocolInjector.packetQueued(ProtocolInjector.java:309) [ProtocolLib.jar:4.2.1]
	at com.comphenix.protocol.injector.netty.ProtocolInjector.onPacketSending(ProtocolInjector.java:269) [ProtocolLib.jar:4.2.1]
	at com.comphenix.protocol.injector.netty.ChannelInjector.processSending(ChannelInjector.java:396) [ProtocolLib.jar:4.2.1]
	at com.comphenix.protocol.injector.netty.ChannelInjector.access$500(ChannelInjector.java:77) [ProtocolLib.jar:4.2.1]
	at com.comphenix.protocol.injector.netty.ChannelInjector$5.handleScheduled(ChannelInjector.java:362) [ProtocolLib.jar:4.2.1]
	at com.comphenix.protocol.injector.netty.ChannelInjector$5.onMessageScheduled(ChannelInjector.java:330) [ProtocolLib.jar:4.2.1]
	at com.comphenix.protocol.injector.netty.ChannelProxy$2.schedulingRunnable(ChannelProxy.java:127) [ProtocolLib.jar:4.2.1]
	at com.comphenix.protocol.injector.netty.EventLoopProxy.execute(EventLoopProxy.java:95) [ProtocolLib.jar:4.2.1]
	at net.minecraft.server.v1_8_R3.NetworkManager.a(NetworkManager.java:192) [spigot-1.8.8-R0.1-29.02.16.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.NetworkManager.handle(NetworkManager.java:141) [spigot-1.8.8-R0.1-29.02.16.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.PlayerConnection.sendPacket(PlayerConnection.java:907) [spigot-1.8.8-R0.1-29.02.16.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.EntityTrackerEntry.updatePlayer(EntityTrackerEntry.java:332) [spigot-1.8.8-R0.1-29.02.16.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.EntityTracker.updatePlayers(EntityTracker.java:191) [spigot-1.8.8-R0.1-29.02.16.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:803) [spigot-1.8.8-R0.1-29.02.16.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot-1.8.8-R0.1-29.02.16.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [spigot-1.8.8-R0.1-29.02.16.jar:git-Spigot-db6de12-18fbb24]
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [spigot-1.8.8-R0.1-29.02.16.jar:git-Spigot-db6de12-18fbb24]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_66]

W czym jest problem?