[21:06:56] [Server thread/ERROR]: Could not pass event PlayerJoinEvent to Opticore vComedic Kangaroo
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:297) ~[craftbukkit-1.8-R0.1-SNAPSHOT.jar:git-Bukkit-7bc218d]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit-1.8-R0.1-SNAPSHOT.jar:git-Bukkit-7bc218d]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:501) [craftbukkit-1.8-R0.1-SNAPSHOT.jar:git-Bukkit-7bc218d]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:486) [craftbukkit-1.8-R0.1-SNAPSHOT.jar:git-Bukkit-7bc218d]
	at net.minecraft.server.v1_8_R1.PlayerList.onPlayerJoin(PlayerList.java:249) [craftbukkit-1.8-R0.1-SNAPSHOT.jar:git-Bukkit-7bc218d]
	at net.minecraft.server.v1_8_R1.PlayerList.a(PlayerList.java:134) [craftbukkit-1.8-R0.1-SNAPSHOT.jar:git-Bukkit-7bc218d]
	at net.minecraft.server.v1_8_R1.LoginListener.b(LoginListener.java:81) [craftbukkit-1.8-R0.1-SNAPSHOT.jar:git-Bukkit-7bc218d]
	at net.minecraft.server.v1_8_R1.LoginListener.c(LoginListener.java:41) [craftbukkit-1.8-R0.1-SNAPSHOT.jar:git-Bukkit-7bc218d]
	at net.minecraft.server.v1_8_R1.NetworkManager.a(NetworkManager.java:150) [craftbukkit-1.8-R0.1-SNAPSHOT.jar:git-Bukkit-7bc218d]
	at net.minecraft.server.v1_8_R1.ServerConnection.c(SourceFile:151) [craftbukkit-1.8-R0.1-SNAPSHOT.jar:git-Bukkit-7bc218d]
	at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:718) [craftbukkit-1.8-R0.1-SNAPSHOT.jar:git-Bukkit-7bc218d]
	at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:284) [craftbukkit-1.8-R0.1-SNAPSHOT.jar:git-Bukkit-7bc218d]
	at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:598) [craftbukkit-1.8-R0.1-SNAPSHOT.jar:git-Bukkit-7bc218d]
	at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:506) [craftbukkit-1.8-R0.1-SNAPSHOT.jar:git-Bukkit-7bc218d]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_25]
Caused by: java.lang.NullPointerException
	at net.dkcraft.opticore.listeners.PlayerAliasConfig.onPlayerJoin(PlayerAliasConfig.java:53) ~[?:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_25]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_25]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_25]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_25]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:295) ~[craftbukkit-1.8-R0.1-SNAPSHOT.jar:git-Bukkit-7bc218d]
	... 14 more