[SEVERE] Could not pass event SignChangeEvent to ShowCaseStandalone v1.43
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:341)
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:1330)
	at net.minecraft.server.Packet130UpdateSign.handle(SourceFile:46)
	at net.minecraft.server.NetworkManager.b(NetworkManager.java:282)
	at net.minecraft.server.NetServerHandler.d(NetServerHandler.java:111)
	at net.minecraft.server.ServerConnection.b(SourceFile:35)
	at net.minecraft.server.DedicatedServerConnection.b(SourceFile:30)
	at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:568)
	at net.minecraft.server.DedicatedServer.r(DedicatedServer.java:214)
	at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:485)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:418)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:818)
Caused by: java.lang.ClassCastException: org.bukkit.craftbukkit.block.CraftBlockState cannot be cast to org.bukkit.block.Sign
	at com.kellerkindt.scs.listeners.ShowCaseListener.onSignChanged(ShowCaseListener.java:35)
	at sun.reflect.GeneratedMethodAccessor466.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:339)
	... 14 more