Błąd wewnętrzny -.-

Podczas próby wykonania komendy mam taki super komunikat:

An internal error occurred while attempting to perform this commnd

Za to błąd z konsoli:

[22:10:29 ERROR]: #!#!
[22:10:29 ERROR]: #!#! [Skript] Severe Error:
[22:10:29 ERROR]: #!#!
[22:10:29 ERROR]: #!#! If you're developing an add-on for Skript this likely means that you have done something wrong.
[22:10:29 ERROR]: #!#! If you're a server admin however please go to http://dev.bukkit.org/server-mods/skript/tickets/
[22:10:29 ERROR]: #!#! and check whether this error has already been reported.
[22:10:29 ERROR]: #!#! If not please create a new ticket with a meaningful title, copy & paste this whole error into it,
[22:10:29 ERROR]: #!#! and describe what you did before it happened and/or what you think caused the error.
[22:10:29 ERROR]: #!#! If you think that it's a trigger that's causing the error please post the trigger as well.
[22:10:29 ERROR]: #!#! By following this guide fixing the error should be easy and done fast.
[22:10:29 ERROR]: #!#!
[22:10:29 ERROR]: #!#! Stack trace:
[22:10:29 ERROR]: #!#! java.lang.IllegalStateException: no implementation set
[22:10:29 ERROR]: #!#!     at net.citizensnpcs.api.CitizensAPI.getImplementation(CitizensAPI.java:65)
[22:10:29 ERROR]: #!#!     at net.citizensnpcs.api.CitizensAPI.getNPCRegistry(CitizensAPI.java:96)
[22:10:29 ERROR]: #!#!     at net.rayfall.eyesniper2.skrayfall.citizeneffects.EffCreateCitizen.execute(EffCreateCitizen.java:43)
[22:10:29 ERROR]: #!#!     at ch.njol.skript.lang.Effect.run(Effect.java:50)
[22:10:29 ERROR]: #!#!     at ch.njol.skript.lang.TriggerItem.walk(TriggerItem.java:63)
[22:10:29 ERROR]: #!#!     at ch.njol.skript.lang.TriggerItem.walk(TriggerItem.java:91)
[22:10:29 ERROR]: #!#!     at ch.njol.skript.lang.Trigger.execute(Trigger.java:53)
[22:10:29 ERROR]: #!#!     at ch.njol.skript.command.ScriptCommand$1.call(ScriptCommand.java:220)
[22:10:29 ERROR]: #!#!     at ch.njol.skript.command.ScriptCommand$1.call(ScriptCommand.java:1)
[22:10:29 ERROR]: #!#!     at ch.njol.skript.util.Task.callSync(Task.java:139)
[22:10:29 ERROR]: #!#!     at ch.njol.skript.command.ScriptCommand.execute(ScriptCommand.java:193)
[22:10:29 ERROR]: #!#!     at ch.njol.skript.command.Commands.handleCommand(Commands.java:260)
[22:10:29 ERROR]: #!#!     at ch.njol.skript.command.Commands$1.onPlayerCommand(Commands.java:155)
[22:10:29 ERROR]: #!#!     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[22:10:29 ERROR]: #!#!     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
[22:10:29 ERROR]: #!#!     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
[22:10:29 ERROR]: #!#!     at java.lang.reflect.Method.invoke(Unknown Source)
[22:10:29 ERROR]: #!#!     at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:298)
[22:10:29 ERROR]: #!#!     at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
[22:10:29 ERROR]: #!#!     at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:509)
[22:10:29 ERROR]: #!#!     at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:494)
[22:10:29 ERROR]: #!#!     at net.minecraft.server.v1_7_R4.PlayerConnection.handleCommand(PlayerConnection.java:1035)
[22:10:29 ERROR]: #!#!     at net.minecraft.server.v1_7_R4.PlayerConnection.a(PlayerConnection.java:880)
[22:10:29 ERROR]: #!#!     at net.minecraft.server.v1_7_R4.PacketPlayInChat.a(PacketPlayInChat.java:28)
[22:10:29 ERROR]: #!#!     at net.minecraft.server.v1_7_R4.PacketPlayInChat.handle(PacketPlayInChat.java:65)
[22:10:29 ERROR]: #!#!     at net.minecraft.server.v1_7_R4.NetworkManager.a(NetworkManager.java:186)
[22:10:29 ERROR]: #!#!     at net.minecraft.server.v1_7_R4.ServerConnection.c(ServerConnection.java:81)
[22:10:29 ERROR]: #!#!     at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:734)
[22:10:29 ERROR]: #!#!     at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:289)
[22:10:29 ERROR]: #!#!     at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:584)
[22:10:29 ERROR]: #!#!     at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:490)
[22:10:29 ERROR]: #!#!     at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628)
[22:10:29 ERROR]: #!#!
[22:10:29 ERROR]: #!#! Version Information:
[22:10:29 ERROR]: #!#!   Skript: 2.1.2
[22:10:29 ERROR]: #!#!   Bukkit: 1.7.10-R0.1-SNAPSHOT
[22:10:29 ERROR]: #!#!   Minecraft: 1.7.10
[22:10:29 ERROR]: #!#!   Java: 1.8.0_144
[22:10:29 ERROR]: #!#!
[22:10:29 ERROR]: #!#! Running CraftBukkit: false
[22:10:29 ERROR]: #!#!
[22:10:29 ERROR]: #!#! Current node: null
[22:10:29 ERROR]: #!#! Current item: Created NPC named: "Steve" Loaction: [[direction:at]] the location of (the player >> ch.njol.skript.classes.data.DefaultConverters$10@6e0bd8a6: org.bukkit.entity.Player->org.bukkit.Location) Type:entity
[22:10:29 ERROR]: #!#!
[22:10:29 ERROR]: #!#! Thread: Server thread
[22:10:29 ERROR]: #!#!
[22:10:29 ERROR]: #!#! End of Error.
[22:10:29 ERROR]: #!#!