[11:34:14] [Server thread/ERROR]: Could not pass event PlayerInteractEvent to SellSignsEC v1.0
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:509) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:494) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at org.bukkit.craftbukkit.v1_7_R4.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:242) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at org.bukkit.craftbukkit.v1_7_R4.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:212) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.PlayerConnection.a(PlayerConnection.java:1082) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.PacketPlayInArmAnimation.a(PacketPlayInArmAnimation.java:28) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.PacketPlayInArmAnimation.handle(PacketPlayInArmAnimation.java:40) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.NetworkManager.a(NetworkManager.java:186) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.ServerConnection.c(ServerConnection.java:81) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:734) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:289) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:584) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:490) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
Caused by: java.lang.NullPointerException
	at io.totokaka.endercraft.sellsigns.sign.SignInteractionHandler.onPlayerInteract(SignInteractionHandler.java:36) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor65.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_55]
	at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_55]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:298) ~[spigot-patched.jar:git-Spigot-1.7.9-R0.2-207-g03373bb]
	... 15 more