Problème plugin trader

Bonjour, j'au un problème avec le plugin trader : quand je tente de créer un trader avec "/trader create vir", rien ne se passe et la console de commande écrit

[20:26:01 INFO]: thevivi84 issued server command: /trader create vir

[20:26:01 WARN]: DataWatcher ID conflict for player:[unknown] @ 26

[20:26:01 WARN]: DataWatcher ID conflict for player:[unknown] @ 27

[20:26:01 WARN]: DataWatcher ID conflict for player:[unknown] @ 28

[20:26:01 WARN]: java.lang.reflect.InvocationTargetException

[20:26:01 WARN]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native M

ethod)

[20:26:01 WARN]: at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown S

ource)

[20:26:01 WARN]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unkno

wn Source)

[20:26:01 WARN]: at java.lang.reflect.Method.invoke(Unknown Source)

[20:26:01 WARN]: at net.dandielo.citizens.traders_v3.core.commands.Comman

dManager$CommandBinding.execute(CommandManager.java:303)

[20:26:01 WARN]: at net.dandielo.citizens.traders_v3.core.commands.Comman

dManager.execute(CommandManager.java:142)

[20:26:01 WARN]: at net.dandielo.citizens.traders_v3.core.commands.DtlCom

mandExecutor.onCommand(DtlCommandExecutor.java:31)

[20:26:01 WARN]: at org.bukkit.command.PluginCommand.execute(PluginComman

d.java:44)

[20:26:01 WARN]: at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCo

mmandMap.java:175)

[20:26:01 WARN]: at org.bukkit.craftbukkit.v1_7_R1.CraftServer.dispatchCo

mmand(CraftServer.java:648)

[20:26:01 WARN]: at net.minecraft.network.NetHandlerPlayServer.func_14736

1_d(NetHandlerPlayServer.java:1345)

[20:26:01 WARN]: at net.minecraft.network.NetHandlerPlayServer.func_14735

4_a(NetHandlerPlayServer.java:1127)

[20:26:01 WARN]: at net.minecraft.network.play.client.C01PacketChatMessag

e.func_148833_a(C01PacketChatMessage.java:38)

[20:26:01 WARN]: at net.minecraft.network.play.client.C01PacketChatMessag

e.func_148833_a(C01PacketChatMessage.java:53)

[20:26:01 WARN]: at net.minecraft.network.NetworkManager.func_74428_b(Net

workManager.java:206)

[20:26:01 WARN]: at net.minecraft.network.NetworkSystem.func_151269_c(Net

workSystem.java:173)

[20:26:01 WARN]: at net.minecraft.server.MinecraftServer.func_71190_q(Min

ecraftServer.java:953)

[20:26:01 WARN]: at net.minecraft.server.dedicated.DedicatedServer.func_7

1190_q(DedicatedServer.java:432)

[20:26:01 WARN]: at net.minecraft.server.MinecraftServer.func_71217_p(Min

ecraftServer.java:783)

[20:26:01 WARN]: at net.minecraft.server.MinecraftServer.run(MinecraftSer

ver.java:646)

[20:26:01 WARN]: at java.lang.Thread.run(Unknown Source)

[20:26:01 WARN]: Caused by: java.lang.IllegalAccessError: tried to access field

net.minecraft.pathfinding.PathNavigate.field_75521_i from class net.citizensnpcs

.util.nms.PlayerNavigation

[20:26:01 WARN]: at net.citizensnpcs.util.nms.PlayerNavigation.<init>(Pla

yerNavigation.java:27)

[20:26:01 WARN]: at net.citizensnpcs.npc.entity.EntityHumanNPC.initialise

(EntityHumanNPC.java:215)

[20:26:01 WARN]: at net.citizensnpcs.npc.entity.EntityHumanNPC.<init>(Ent

ityHumanNPC.java:65)

[20:26:01 WARN]: at net.citizensnpcs.npc.entity.HumanController.createEnt

ity(HumanController.java:29)

[20:26:01 WARN]: at net.citizensnpcs.npc.AbstractEntityController.spawn(A

bstractEntityController.java:36)

[20:26:01 WARN]: at net.citizensnpcs.npc.CitizensNPC.spawn(CitizensNPC.ja

va:161)

[20:26:01 WARN]: at net.dandielo.citizens.traders_v3.bukkit.commands.Trad

erCommands.traderCreate(TraderCommands.java:96)

[20:26:01 WARN]: ... 21 more

 

Citizens, dtltraders, essentials, essentials anti-build, essentials chat, essentials protect, essentials spawn, iConomy, jobs, multiworld, Permissionbukkit, Questionner, quests, simpleprefix, townychat, towny, vault, worldedit, worldguard.

 

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