Instances Error

[18:39:32 ERROR]: Could not pass event PlayerMoveEvent to Instances v1.23-antony
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot-1.9.4.jar:git-Spigot-4af49dc-23da8b0]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.9.4.jar:git-Spigot-4af49dc-23da8b0]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot-1.9.4.jar:git-Spigot-4af49dc-23da8b0]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot-1.9.4.jar:git-Spigot-4af49dc-23da8b0]
        at net.minecraft.server.v1_9_R2.PlayerConnection.a(PlayerConnection.java:607) [spigot-1.9.4.jar:git-Spigot-4af49dc-23da8b0]
        at net.minecraft.server.v1_9_R2.PacketPlayInFlying.a(SourceFile:126) [spigot-1.9.4.jar:git-Spigot-4af49dc-23da8b0]
        at net.minecraft.server.v1_9_R2.PacketPlayInFlying$PacketPlayInPosition.a(SourceFile:57) [spigot-1.9.4.jar:git-Spigot-4af49dc-23da8b0]
        at net.minecraft.server.v1_9_R2.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.9.4.jar:git-Spigot-4af49dc-23da8b0]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_91]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_91]
        at net.minecraft.server.v1_9_R2.SystemUtils.a(SourceFile:45) [spigot-1.9.4.jar:git-Spigot-4af49dc-23da8b0]
        at net.minecraft.server.v1_9_R2.MinecraftServer.D(MinecraftServer.java:726) [spigot-1.9.4.jar:git-Spigot-4af49dc-23da8b0]
        at net.minecraft.server.v1_9_R2.DedicatedServer.D(DedicatedServer.java:399) [spigot-1.9.4.jar:git-Spigot-4af49dc-23da8b0]
        at net.minecraft.server.v1_9_R2.MinecraftServer.C(MinecraftServer.java:665) [spigot-1.9.4.jar:git-Spigot-4af49dc-23da8b0]
        at net.minecraft.server.v1_9_R2.MinecraftServer.run(MinecraftServer.java:564) [spigot-1.9.4.jar:git-Spigot-4af49dc-23da8b0]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_91]
Caused by: java.lang.NullPointerException
        at java.util.concurrent.ConcurrentHashMap.putVal(Unknown Source) ~[?:1.8.0_91]
        at java.util.concurrent.ConcurrentHashMap.putIfAbsent(Unknown Source) ~[?:1.8.0_91]
        at org.cyberiantiger.minecraft.instances.unsafe.depend.WorldGuardWorldInheritanceFactory$WorldGuardWorldInheritance.preAddInheritance(WorldGuardWorldInheritanceFactory.java:98) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_91]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_91]
        at org.cyberiantiger.minecraft.instances.util.DependencyUtil$1.invoke(DependencyUtil.java:36) ~[?:?]
        at com.sun.proxy.$Proxy51.preAddInheritance(Unknown Source) ~[?:?]
        at org.cyberiantiger.minecraft.instances.Instances.createInstance(Instances.java:370) ~[?:?]
        at org.cyberiantiger.minecraft.instances.InstanceEntrancePortal.onEnter(InstanceEntrancePortal.java:124) ~[?:?]
        at org.cyberiantiger.minecraft.instances.Instances.onPlayerMove(Instances.java:840) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_91]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_91]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-1.9.4.jar:git-Spigot-4af49dc-23da8b0]
        ... 15 more