[13:46:30] [Server thread/WARN]: [Anti-FF] Task #43 for Anti-ForceField v1.4.7 generated an exception
java.lang.IllegalArgumentException: Unable to find a field null with the type net.minecraft.util.io.netty.channel.Channel in me.heirteir.antiff.npc.NPCNetworkManager
	at com.comphenix.protocol.reflect.FuzzyReflection.getFieldByType(FuzzyReflection.java:367) ~[?:?]
	at com.comphenix.protocol.reflect.accessors.Accessors.getFieldAccessor(Accessors.java:56) ~[?:?]
	at com.comphenix.protocol.reflect.FuzzyReflection.getFieldValue(FuzzyReflection.java:104) ~[?:?]
	at com.comphenix.protocol.injector.netty.InjectionFactory.fromPlayer(InjectionFactory.java:72) ~[?:?]
	at com.comphenix.protocol.injector.netty.NettyProtocolInjector$4.sendServerPacket(NettyProtocolInjector.java:341) ~[?:?]
	at com.comphenix.protocol.injector.PacketFilterManager.sendServerPacket(PacketFilterManager.java:791) ~[?:?]
	at com.comphenix.protocol.injector.PacketFilterManager.sendServerPacket(PacketFilterManager.java:765) ~[?:?]
	at me.heirteir.antiff.EntityHider.hideEntity(EntityHider.java:281) ~[?:?]
	at me.heirteir.antiff.listeners.PlayerListener$1.run(PlayerListener.java:174) ~[?:?]
	at org.bukkit.craftbukkit.v1_7_R3.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot.jar:git-Spigot-1543]
	at org.bukkit.craftbukkit.v1_7_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:346) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:638) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:284) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:584) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:490) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [spigot.jar:git-Spigot-1543]
[13:46:30] [Server thread/WARN]: [Anti-FF] Task #43 for Anti-ForceField v1.4.7 generated an exception
java.lang.IllegalArgumentException: Unable to find a field null with the type net.minecraft.util.io.netty.channel.Channel in me.heirteir.antiff.npc.NPCNetworkManager
	at com.comphenix.protocol.reflect.FuzzyReflection.getFieldByType(FuzzyReflection.java:367) ~[?:?]
	at com.comphenix.protocol.reflect.accessors.Accessors.getFieldAccessor(Accessors.java:56) ~[?:?]
	at com.comphenix.protocol.reflect.FuzzyReflection.getFieldValue(FuzzyReflection.java:104) ~[?:?]
	at com.comphenix.protocol.injector.netty.InjectionFactory.fromPlayer(InjectionFactory.java:72) ~[?:?]
	at com.comphenix.protocol.injector.netty.NettyProtocolInjector$4.sendServerPacket(NettyProtocolInjector.java:341) ~[?:?]
	at com.comphenix.protocol.injector.PacketFilterManager.sendServerPacket(PacketFilterManager.java:791) ~[?:?]
	at com.comphenix.protocol.injector.PacketFilterManager.sendServerPacket(PacketFilterManager.java:765) ~[?:?]
	at me.heirteir.antiff.EntityHider.hideEntity(EntityHider.java:281) ~[?:?]
	at me.heirteir.antiff.listeners.PlayerListener$1.run(PlayerListener.java:174) ~[?:?]
	at org.bukkit.craftbukkit.v1_7_R3.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot.jar:git-Spigot-1543]
	at org.bukkit.craftbukkit.v1_7_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:346) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:638) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:284) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:584) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:490) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [spigot.jar:git-Spigot-1543]