OTG Error

[09:13:31] [Server thread/ERROR] [FML]: Exception caught during firing event net.minecraftforge.fml.common.network.FMLNetworkEvent$ServerConnectionFromClientEvent@4944d774:
java.lang.NullPointerException
	at com.khorn.terraincontrol.forge.events.PlayerTracker.SendWorldAndBiomeConfigs(PlayerTracker.java:70) ~[PlayerTracker.class:?]
	at com.khorn.terraincontrol.forge.events.PlayerTracker.onConnectionCreated(PlayerTracker.java:35) ~[PlayerTracker.class:?]
	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_450_PlayerTracker_onConnectionCreated_ServerConnectionFromClientEvent.invoke(.dynamic) ~[?:?]
	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) ~[ASMEventHandler.class:?]
	at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:185) [EventBus.class:?]
	at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.completeServerSideConnection(NetworkDispatcher.java:257) [NetworkDispatcher.class:?]
	at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.access$100(NetworkDispatcher.java:73) [NetworkDispatcher.class:?]
	at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.func_73660_a(NetworkDispatcher.java:209) [NetworkDispatcher$1.class:?]
	at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:287) [eo.class:?]
	at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:180) [md.class:?]
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:732) [MinecraftServer.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:387) [ld.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471) [MinecraftServer.class:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
[09:13:31] [Server thread/ERROR] [FML]: Index: 2 Listeners:
[09:13:31] [Server thread/ERROR] [FML]: 0: NORMAL
[09:13:31] [Server thread/ERROR] [FML]: 1: ASM: p455w0rd.wct.sync.network.NetworkHandler@25a48b9a newConnection(Lnet/minecraftforge/fml/common/network/FMLNetworkEvent$ServerConnectionFromClientEvent;)V
[09:13:31] [Server thread/ERROR] [FML]: 2: ASM: com.khorn.terraincontrol.forge.events.PlayerTracker@2cbfed6d onConnectionCreated(Lnet/minecraftforge/fml/common/network/FMLNetworkEvent$ServerConnectionFromClientEvent;)V
[09:13:31] [Server thread/ERROR] [FML]: 3: ASM: appeng.core.sync.network.NetworkHandler@4c04daf2 newConnection(Lnet/minecraftforge/fml/common/network/FMLNetworkEvent$ServerConnectionFromClientEvent;)V
[09:13:31] [Server thread/WARN]: Failed to handle packet for /104.172.254.37:53782
java.lang.NullPointerException
	at com.khorn.terraincontrol.forge.events.PlayerTracker.SendWorldAndBiomeConfigs(PlayerTracker.java:70) ~[PlayerTracker.class:?]
	at com.khorn.terraincontrol.forge.events.PlayerTracker.onConnectionCreated(PlayerTracker.java:35) ~[PlayerTracker.class:?]
	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_450_PlayerTracker_onConnectionCreated_ServerConnectionFromClientEvent.invoke(.dynamic) ~[?:?]
	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) ~[ASMEventHandler.class:?]
	at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:185) ~[EventBus.class:?]
	at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.completeServerSideConnection(NetworkDispatcher.java:257) ~[NetworkDispatcher.class:?]
	at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.access$100(NetworkDispatcher.java:73) ~[NetworkDispatcher.class:?]
	at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.func_73660_a(NetworkDispatcher.java:209) ~[NetworkDispatcher$1.class:?]
	at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:287) ~[eo.class:?]
	at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:180) [md.class:?]
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:732) [MinecraftServer.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:387) [ld.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471) [MinecraftServer.class:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
[09:13:31] [Server thread/INFO]: chezboutin lost connection: TextComponent{text='Internal server error', siblings=[], style=Style{hasParent=false, color=null, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null, insertion=null}}