2019-07-23 22:42:36 [SEVERE] Could not pass event PlayerMoveEvent to RubyButton v1.2.1
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:437)
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:67)
	at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:47)
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:479)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:464)
	at net.minecraft.network.NetServerHandler.func_72498_a(NetServerHandler.java:363)
	at net.minecraft.network.packet.Packet10Flying.func_73279_a(SourceFile:136)
	at net.minecraft.network.TcpConnection.func_74428_b(TcpConnection.java:426)
	at net.minecraft.network.NetServerHandler.func_72570_d(NetServerHandler.java:234)
	at net.minecraft.network.NetworkListenThread.func_71747_b(NetworkListenThread.java:54)
	at net.minecraft.server.dedicated.DedicatedServerListenThread.func_71747_b(DedicatedServerListenThread.java:37)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:917)
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:261)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:784)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:666)
	at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)
Caused by: java.lang.NullPointerException