>20:41:51 [SEVERE] Could not pass event PlayerQuitEvent to xAuth
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:304)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:460)
at net.minecraft.server.ServerConfigurationManager.disconnect(ServerConfigurationManager.java:179)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:698)
at net.minecraft.server.NetworkManager.b(NetworkManager.java:234)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:113)
at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:78)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:567)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:459)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.lang.NullPointerException
at org.bukkit.craftbukkit.inventory.CraftItemStack.rebuildEnchantments(CraftItemStack.java:202)
at org.bukkit.craftbukkit.inventory.CraftItemStack.addUnsafeEnchantment(CraftItemStack.java:146)
at org.bukkit.inventory.ItemStack.addUnsafeEnchantments(ItemStack.java:317)
at org.bukkit.craftbukkit.inventory.CraftItemStack.<init>(CraftItemStack.java:28)
at org.bukkit.craftbukkit.inventory.CraftItemStack.createNMSItemStack(CraftItemStack.java:232)
at org.bukkit.craftbukkit.inventory.CraftInventory.setContents(CraftInventory.java:69)
at com.cypherx.xauth.PlayerDataHandler.restoreData(PlayerDataHandler.java:278)
at com.cypherx.xauth.PlayerManager.unprotect(PlayerManager.java:186)
at com.cypherx.xauth.listeners.xAuthPlayerListener.onPlayerQuit(xAuthPlayerListener.java:123)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302)
... 10 more