[SEVERE] Could not pass event PlayerMoveEvent to TheWalls v1.1.0.1
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427)
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
	at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:39)
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:479)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:464)
	at net.minecraft.server.v1_5_R3.PlayerConnection.a(PlayerConnection.java:217)
	at net.minecraft.server.v1_5_R3.Packet10Flying.handle(SourceFile:136)
	at org.spigotmc.netty.NettyNetworkManager.b(NettyNetworkManager.java:186)
	at net.minecraft.server.v1_5_R3.PlayerConnection.d(PlayerConnection.java:110)
	at net.minecraft.server.v1_5_R3.ServerConnection.b(SourceFile:35)
	at org.spigotmc.MultiplexingServerConnection.b(MultiplexingServerConnection.java:72)
	at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:583)
	at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:224)
	at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:472)
	at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:404)
	at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)
Caused by: java.lang.NullPointerException