Beyond client crash

[19:21:58] [Server thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.NullPointerException
	at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.8.0_131]
	at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.8.0_131]
	at net.minecraft.util.Util.func_181617_a(SourceFile:46) [h.class:?]
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:668) [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(Unknown Source) [?:1.8.0_131]
Caused by: java.lang.NullPointerException
	at scala.collection.mutable.ArrayOps$ofRef$.length$extension(ArrayOps.scala:192) ~[ArrayOps$ofRef$.class:?]
	at scala.collection.mutable.ArrayOps$ofRef.length(ArrayOps.scala:192) ~[ArrayOps$ofRef.class:?]
	at scala.collection.GenSeqLike$class.isDefinedAt(GenSeqLike.scala:72) ~[GenSeqLike$class.class:?]
	at scala.collection.mutable.ArrayOps$ofRef.isDefinedAt(ArrayOps.scala:186) ~[ArrayOps$ofRef.class:?]
	at mrtjp.core.inventory.TInventory$$anonfun$loadInv$1.apply$mcVI$sp(invtraits.scala:89) ~[TInventory$$anonfun$loadInv$1.class:?]
	at scala.collection.immutable.Range.foreach$mVc$sp(Range.scala:160) ~[scala-library-2.11.1.jar:?]
	at mrtjp.core.inventory.TInventory$class.loadInv(invtraits.scala:84) ~[TInventory$class.class:?]
	at mrtjp.projectred.exploration.BagInventory.loadInv(items.scala:114) ~[BagInventory.class:?]
	at mrtjp.core.inventory.TInventory$class.loadInv(invtraits.scala:80) ~[TInventory$class.class:?]
	at mrtjp.projectred.exploration.BagInventory.loadInv(items.scala:114) ~[BagInventory.class:?]
	at mrtjp.projectred.exploration.BagInventory.loadInventory(items.scala:125) ~[BagInventory.class:?]
	at mrtjp.projectred.exploration.BagInventory.<init>(items.scala:116) ~[BagInventory.class:?]
	at mrtjp.projectred.exploration.ItemBackpack$.createContainer(items.scala:77) ~[ItemBackpack$.class:?]
	at mrtjp.projectred.exploration.ItemBackpack.openGui(items.scala:54) ~[ItemBackpack.class:?]
	at mrtjp.projectred.exploration.ItemBackpack.func_180614_a(items.scala:42) ~[ItemBackpack.class:?]
	at net.minecraftforge.common.ForgeHooks.onPlaceItemIntoWorld(ForgeHooks.java:780) ~[ForgeHooks.class:?]
	at net.minecraft.item.ItemStack.func_179546_a(ItemStack.java:145) ~[adz.class:?]
	at net.minecraft.server.management.PlayerInteractionManager.func_187251_a(PlayerInteractionManager.java:483) ~[lv.class:?]
	at net.minecraft.network.NetHandlerPlayServer.func_184337_a(NetHandlerPlayServer.java:679) ~[me.class:?]
	at net.minecraft.network.play.client.CPacketPlayerTryUseItemOnBlock.func_148833_a(SourceFile:55) ~[jj.class:?]
	at net.minecraft.network.play.client.CPacketPlayerTryUseItemOnBlock.func_148833_a(SourceFile:11) ~[jj.class:?]
	at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) ~[fl$1.class:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_131]
	at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_131]
	at net.minecraft.util.Util.func_181617_a(SourceFile:45) ~[h.class:?]
	... 5 more
[19:22:10] [Server thread/INFO]: Addar lost connection: TranslatableComponent{key='disconnect.genericReason', args=[Internal Exception: java.io.IOException: An existing connection was forcibly closed by the remote host], siblings=[], style=Style{hasParent=false, color=null, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null, insertion=null}}
[19:22:10] [Server thread/INFO]: Addar left the game