[16:18:04] [Server thread/INFO]: WindSkull lost connection: Disconnected
[16:18:04] [Server thread/ERROR]: Could not pass event PlayerQuitEvent to PluginMyHeroCore v0.23
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot-1.10-R0.1-SNAPSHOT-latest.jar:git-Spigot-6016ac7-10c10b3]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.10-R0.1-SNAPSHOT-latest.jar:git-Spigot-6016ac7-10c10b3]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot-1.10-R0.1-SNAPSHOT-latest.jar:git-Spigot-6016ac7-10c10b3]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot-1.10-R0.1-SNAPSHOT-latest.jar:git-Spigot-6016ac7-10c10b3]
	at net.minecraft.server.v1_10_R1.PlayerList.disconnect(PlayerList.java:385) [spigot-1.10-R0.1-SNAPSHOT-latest.jar:git-Spigot-6016ac7-10c10b3]
	at net.minecraft.server.v1_10_R1.PlayerConnection.a(PlayerConnection.java:1058) [spigot-1.10-R0.1-SNAPSHOT-latest.jar:git-Spigot-6016ac7-10c10b3]
	at net.minecraft.server.v1_10_R1.NetworkManager.handleDisconnection(NetworkManager.java:318) [spigot-1.10-R0.1-SNAPSHOT-latest.jar:git-Spigot-6016ac7-10c10b3]
	at net.minecraft.server.v1_10_R1.ServerConnection.c(ServerConnection.java:174) [spigot-1.10-R0.1-SNAPSHOT-latest.jar:git-Spigot-6016ac7-10c10b3]
	at net.minecraft.server.v1_10_R1.MinecraftServer.D(MinecraftServer.java:832) [spigot-1.10-R0.1-SNAPSHOT-latest.jar:git-Spigot-6016ac7-10c10b3]
	at net.minecraft.server.v1_10_R1.DedicatedServer.D(DedicatedServer.java:399) [spigot-1.10-R0.1-SNAPSHOT-latest.jar:git-Spigot-6016ac7-10c10b3]
	at net.minecraft.server.v1_10_R1.MinecraftServer.C(MinecraftServer.java:672) [spigot-1.10-R0.1-SNAPSHOT-latest.jar:git-Spigot-6016ac7-10c10b3]
	at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:571) [spigot-1.10-R0.1-SNAPSHOT-latest.jar:git-Spigot-6016ac7-10c10b3]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_66]
Caused by: java.lang.NoClassDefFoundError: Core/SerializeItemStackList
	at Events.JoinEvent.PlayerLeave(JoinEvent.java:191) ~[?:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_66]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_66]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_66]
	at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_66]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-1.10-R0.1-SNAPSHOT-latest.jar:git-Spigot-6016ac7-10c10b3]
	... 12 more
Caused by: java.lang.ClassNotFoundException: Core.SerializeItemStackList
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_66]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101) ~[spigot-1.10-R0.1-SNAPSHOT-latest.jar:git-Spigot-6016ac7-10c10b3]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[spigot-1.10-R0.1-SNAPSHOT-latest.jar:git-Spigot-6016ac7-10c10b3]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_66]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_66]
	at Events.JoinEvent.PlayerLeave(JoinEvent.java:191) ~[?:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_66]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_66]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_66]
	at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_66]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-1.10-R0.1-SNAPSHOT-latest.jar:git-Spigot-6016ac7-10c10b3]
	... 12 more
[16:18:04] [Server thread/INFO]: WindSkull left the game.