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java.lang.NullPointerException: 	at io.github.dre2n.dungeonsxl.sign.ReadySign.ready(ReadySign.java:159)	at io.github.dre2n.dungeonsxl.sign.ReadySign.onPlayerTrigger(ReadySign.java:118)	at io.github.dre2n.dungeonsxl.sign.DSign.onUpdate(DSign.java:169)	at io.github.dre2n.dungeonsxl.trigger.Trigger.updateDSigns(Trigger.java:112)	at io.github.dre2n.dungeonsxl.trigger.InteractTrigger.onTrigger(InteractTrigger.java:49)	at io.github.dre2n.dungeonsxl.listener.PlayerListener.onInteract(PlayerListener.java:283)	at sun.reflect.GeneratedMethodAccessor71.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306)	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502)	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487)	at org.bukkit.craftbukkit.v1_10_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:231)	at org.bukkit.craftbukkit.v1_10_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:198)	at net.minecraft.server.v1_10_R1.PlayerInteractManager.a(PlayerInteractManager.java:111)	at net.minecraft.server.v1_10_R1.PlayerConnection.a(PlayerConnection.java:834)	at net.minecraft.server.v1_10_R1.PacketPlayInBlockDig.a(SourceFile:40)	at net.minecraft.server.v1_10_R1.PacketPlayInBlockDig.a(SourceFile:10)	at net.minecraft.server.v1_10_R1.PlayerConnectionUtils$1.run(SourceFile:13)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at net.minecraft.server.v1_10_R1.SystemUtils.a(SourceFile:45)	at net.minecraft.server.v1_10_R1.MinecraftServer.D(MinecraftServer.java:737)	at net.minecraft.server.v1_10_R1.DedicatedServer.D(DedicatedServer.java:399)	at net.minecraft.server.v1_10_R1.MinecraftServer.C(MinecraftServer.java:673)	at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:572)	at java.lang.Thread.run(Thread.java:745)