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[16:58:29 ERROR]: Could not pass event PlayerMoveEvent to Factions v2.8.7Beta
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[craftbukkit-1.9.2.jar:git-Bukkit-420b983]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit-1.9.2.jar:git-Bukkit-420b983]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:501) [craftbukkit-1.9.2.jar:git-Bukkit-420b983]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:486) [craftbukkit-1.9.2.jar:git-Bukkit-420b983]
        at net.minecraft.server.v1_9_R1.PlayerConnection.a(PlayerConnection.java:595) [craftbukkit-1.9.2.jar:git-Bukkit-420b983]
        at net.minecraft.server.v1_9_R1.PacketPlayInFlying.a(SourceFile:126) [craftbukkit-1.9.2.jar:git-Bukkit-420b983]
        at net.minecraft.server.v1_9_R1.PacketPlayInFlying$PacketPlayInPosition.a(SourceFile:57) [craftbukkit-1.9.2.jar:git-Bukkit-420b983]
        at net.minecraft.server.v1_9_R1.PlayerConnectionUtils$1.run(SourceFile:13) [craftbukkit-1.9.2.jar:git-Bukkit-420b983]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_31]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_31]
        at net.minecraft.server.v1_9_R1.SystemUtils.a(SourceFile:45) [craftbukkit-1.9.2.jar:git-Bukkit-420b983]
        at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:679) [craftbukkit-1.9.2.jar:git-Bukkit-420b983]
        at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:361) [craftbukkit-1.9.2.jar:git-Bukkit-420b983]
        at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:635) [craftbukkit-1.9.2.jar:git-Bukkit-420b983]
        at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:539) [craftbukkit-1.9.2.jar:git-Bukkit-420b983]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_31]
Caused by: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
        at java.util.ArrayList.rangeCheck(Unknown Source) ~[?:1.8.0_31]
        at java.util.ArrayList.get(Unknown Source) ~[?:1.8.0_31]
        at com.massivecraft.factions.engine.EngineExploit.netherportalTrapUpdate(EngineExploit.java:190) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor48.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_31]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_31]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:300) ~[craftbukkit-1.9.2.jar:git-Bukkit-420b983]
        ... 15 more