Bukkit

[20:50:14] [Server thread/ERROR]: Could not pass event BlockBreakEvent to SignRanksPlus v0.7.1
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:305) ~[spigot.jar:git-Spigot-870264a-0a645a2]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-870264a-0a645a2]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-870264a-0a645a2]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-870264a-0a645a2]
    at net.minecraft.server.v1_8_R2.PlayerInteractManager.breakBlock(PlayerInteractManager.java:286) [spigot.jar:git-Spigot-870264a-0a645a2]
    at net.minecraft.server.v1_8_R2.PlayerInteractManager.a(PlayerInteractManager.java:215) [spigot.jar:git-Spigot-870264a-0a645a2]
    at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java:618) [spigot.jar:git-Spigot-870264a-0a645a2]
    at net.minecraft.server.v1_8_R2.PacketPlayInBlockDig.a(SourceFile:40) [spigot.jar:git-Spigot-870264a-0a645a2]
    at net.minecraft.server.v1_8_R2.PacketPlayInBlockDig.a(SourceFile:10) [spigot.jar:git-Spigot-870264a-0a645a2]
    at net.minecraft.server.v1_8_R2.PlayerConnectionUtils$1.run(SourceFile:13) [spigot.jar:git-Spigot-870264a-0a645a2]
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.7.0_76]
    at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.7.0_76]
    at net.minecraft.server.v1_8_R2.SystemUtils.a(SourceFile:60) [spigot.jar:git-Spigot-870264a-0a645a2]
    at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:712) [spigot.jar:git-Spigot-870264a-0a645a2]
    at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:368) [spigot.jar:git-Spigot-870264a-0a645a2]
    at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:651) [spigot.jar:git-Spigot-870264a-0a645a2]
    at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:554) [spigot.jar:git-Spigot-870264a-0a645a2]
    at java.lang.Thread.run(Unknown Source) [?:1.7.0_76]
Caused by: java.lang.NullPointerException
    at com.empcraft.srp.SignRanksPlus.onBlockBreak(SignRanksPlus.java:1011) ~[?:?]
    at sun.reflect.GeneratedMethodAccessor222.invoke(Unknown Source) ~[?:?]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_76]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_76]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:301) ~[spigot.jar:git-Spigot-870264a-0a645a2]
    ... 17 more

Spigot-Version: CraftBukkit version git-Spigot-870264a-0a645a2 (MC: 1.8.3) (Implementing API version 1.8.3-R0.1-SNAPSHOT)

Every time a player destroyed a sign this error comes. The only permission they had is signranks.use.promote

edit: its a problem with lwc...if i set the config protection: false its all ok

The Problem is the that your plugin is in competition with lwc. If i set the option "protect: true" this error comes...if i set it on false it overrides lwc and it can't protect anymore.