Backpacks Render Crash

[17:20:20] [Client thread/FATAL]: Reported exception thrown!
net.minecraft.util.ReportedException: Rendering screen
	at net.minecraft.client.renderer.EntityRenderer.func_181560_a(EntityRenderer.java:1121) ~[bnz.class:?]
	at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1076) ~[bcx.class:?]
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:371) [bcx.class:?]
	at net.minecraft.client.main.Main.main(SourceFile:124) [Main.class:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_91]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_91]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_91]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_91]
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_91]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_91]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_91]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_91]
	at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:191) [NewLaunch.jar:?]
	at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:252) [NewLaunch.jar:?]
	at org.multimc.EntryPoint.listen(EntryPoint.java:162) [NewLaunch.jar:?]
	at org.multimc.EntryPoint.main(EntryPoint.java:53) [NewLaunch.jar:?]
Caused by: java.lang.NullPointerException
	at de.eydamos.backpack.util.NBTItemStackUtil.hasTag(NBTItemStackUtil.java:28) ~[NBTItemStackUtil.class:?]
	at de.eydamos.backpack.util.NBTItemStackUtil.getString(NBTItemStackUtil.java:52) ~[NBTItemStackUtil.class:?]
	at de.eydamos.backpack.tier.TierLeather.getTierByItemStack(TierLeather.java:47) ~[TierLeather.class:?]
	at de.eydamos.backpack.helper.BackpackHelper.initialize(BackpackHelper.java:23) ~[BackpackHelper.class:?]
	at de.eydamos.backpack.recipe.RecipeBackpackBig.func_77572_b(RecipeBackpackBig.java:52) ~[RecipeBackpackBig.class:?]
	at assets.recipehandler.CraftingHandler.getCraftResult(CraftingHandler.java:108) ~[CraftingHandler.class:?]
	at assets.recipehandler.CraftingHandler.getNumberOfCraft(CraftingHandler.java:142) ~[CraftingHandler.class:?]
	at assets.recipehandler.GuiEventHandler$CreativeButton.func_146112_a(GuiEventHandler.java:49) ~[GuiEventHandler$CreativeButton.class:?]
	at net.minecraft.client.gui.GuiScreen.func_73863_a(GuiScreen.java:71) ~[bft.class:?]
	at net.minecraft.client.gui.inventory.GuiContainer.func_73863_a(GuiContainer.java:81) ~[bgl.class:?]
	at net.minecraftforge.client.ForgeHooksClient.drawScreen(ForgeHooksClient.java:382) ~[ForgeHooksClient.class:?]
	at net.minecraft.client.renderer.EntityRenderer.func_181560_a(EntityRenderer.java:1094) ~[bnz.class:?]
	... 17 more
[17:20:20] [Client thread/INFO] [STDOUT]: [net.minecraft.init.Bootstrap:func_179870_a:560]: ---- Minecraft Crash Report ----

WARNING: coremods are present:
  LoadingPlugin (Quark-r1.0-56.jar)
  ShetiPhian-ASM (shetiphiancore-1.10.0-3.3.1.jar)
  LoadingPlugin (RandomThings-MC1.10.2-3.7.6.jar)
  EnderCorePlugin (EnderCore-1.10.2-0.4.1.56-beta.jar)
  IvToolkit (IvToolkit-1.2.8.5.jar)
  LoadingPlugin (ChunkAnimator-MC1.9.4-1.2.jar)
  FMLPlugin (InventoryTweaks-1.61-58.jar)
  CCLCorePlugin (CodeChickenLib-1.10.2-2.2.3.58-universal.jar)
  MDECore-Core (mdecore-1.10.2-1.1.jar)
Contact their authors BEFORE contacting forge

// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 03/10/16 17:20
Description: Rendering screen

java.lang.NullPointerException: Rendering screen
	at de.eydamos.backpack.util.NBTItemStackUtil.hasTag(NBTItemStackUtil.java:28)
	at de.eydamos.backpack.util.NBTItemStackUtil.getString(NBTItemStackUtil.java:52)
	at de.eydamos.backpack.tier.TierLeather.getTierByItemStack(TierLeather.java:47)
	at de.eydamos.backpack.helper.BackpackHelper.initialize(BackpackHelper.java:23)
	at de.eydamos.backpack.recipe.RecipeBackpackBig.func_77572_b(RecipeBackpackBig.java:52)
	at assets.recipehandler.CraftingHandler.getCraftResult(CraftingHandler.java:108)
	at assets.recipehandler.CraftingHandler.getNumberOfCraft(CraftingHandler.java:142)
	at assets.recipehandler.GuiEventHandler$CreativeButton.func_146112_a(GuiEventHandler.java:49)
	at net.minecraft.client.gui.GuiScreen.func_73863_a(GuiScreen.java:71)
	at net.minecraft.client.gui.inventory.GuiContainer.func_73863_a(GuiContainer.java:81)
	at net.minecraftforge.client.ForgeHooksClient.drawScreen(ForgeHooksClient.java:382)
	at net.minecraft.client.renderer.EntityRenderer.func_181560_a(EntityRenderer.java:1094)
	at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1076)
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:371)
	at net.minecraft.client.main.Main.main(SourceFile:124)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:191)
	at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:252)
	at org.multimc.EntryPoint.listen(EntryPoint.java:162)
	at org.multimc.EntryPoint.main(EntryPoint.java:53)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Client thread
Stacktrace:
	at de.eydamos.backpack.util.NBTItemStackUtil.hasTag(NBTItemStackUtil.java:28)
	at de.eydamos.backpack.util.NBTItemStackUtil.getString(NBTItemStackUtil.java:52)
	at de.eydamos.backpack.tier.TierLeather.getTierByItemStack(TierLeather.java:47)
	at de.eydamos.backpack.helper.BackpackHelper.initialize(BackpackHelper.java:23)
	at de.eydamos.backpack.recipe.RecipeBackpackBig.func_77572_b(RecipeBackpackBig.java:52)
	at assets.recipehandler.CraftingHandler.getCraftResult(CraftingHandler.java:108)
	at assets.recipehandler.CraftingHandler.getNumberOfCraft(CraftingHandler.java:142)
	at assets.recipehandler.GuiEventHandler$CreativeButton.func_146112_a(GuiEventHandler.java:49)
	at net.minecraft.client.gui.GuiScreen.func_73863_a(GuiScreen.java:71)
	at net.minecraft.client.gui.inventory.GuiContainer.func_73863_a(GuiContainer.java:81)
	at net.minecraftforge.client.ForgeHooksClient.drawScreen(ForgeHooksClient.java:382)

-- Screen render details --
Details:
	Screen name: net.minecraft.client.gui.inventory.GuiCrafting
	Mouse location: Scaled: (468, 230). Absolute: (937, 556)
	Screen size: Scaled: (960, 509). Absolute: (1920, 1017). Scale factor of 2

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [EntityPlayerSP['<PROFILE NAME>'/1378, l='MpServer', x=-35.18, y=69.00, z=21.73]]
	Chunk stats: MultiplayerChunkCache: 606, 606
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options:
	Level spawn location: World: (-204,64,96), Chunk: (at 4,4,0 in -13,6; contains blocks -208,0,96 to -193,255,111), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 7001 game time, 7001 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 59 total; [EntityRabbit['Rabbit'/116, l='MpServer', x=-106.47, y=65.00, z=35.50], EntityRabbit['Rabbit'/117, l='MpServer', x=-72.07, y=71.00, z=27.20], EntityRabbit['Rabbit'/118, l='MpServer', x=-74.42, y=71.00, z=32.36], EntityRabbit['Rabbit'/119, l='MpServer', x=-93.02, y=70.00, z=41.70], EntityRabbit['Rabbit'/120, l='MpServer', x=-83.89, y=71.00, z=29.27], EntityRabbit['Rabbit'/121, l='MpServer', x=-85.17, y=71.00, z=45.56], EntityRabbit['Rabbit'/123, l='MpServer', x=-70.50, y=68.00, z=-50.12], EntityRabbit['Rabbit'/124, l='MpServer', x=-67.60, y=68.00, z=-40.60], EntityItem['item.item.actuallyadditions.itemFoodRice'/6347, l='MpServer', x=0.17, y=63.00, z=14.33], EntityCreeper['Creeper'/8594, l='MpServer', x=10.50, y=54.00, z=40.50], EntityCreeper['Creeper'/8683, l='MpServer', x=-79.50, y=33.00, z=45.50], EntityItem['item.tile.seaweed'/6748, l='MpServer', x=-4.04, y=61.00, z=37.52], EntityCreeper['Creeper'/8838, l='MpServer', x=-36.50, y=47.00, z=88.50], EntityBat['Bat'/8876, l='MpServer', x=-106.44, y=19.03, z=81.78], EntityCreeper['Creeper'/8887, l='MpServer', x=-80.50, y=36.00, z=-0.50], EntityBat['Bat'/8911, l='MpServer', x=-80.75, y=33.10, z=32.51], EntityBat['Bat'/8912, l='MpServer', x=-63.34, y=30.29, z=30.62], EntitySkeleton['Skeleton'/8950, l='MpServer', x=-55.50, y=36.00, z=-55.50], EntitySkeleton['Skeleton'/9016, l='MpServer', x=-73.50, y=14.00, z=1.50], EntityBat['Bat'/9029, l='MpServer', x=32.25, y=25.03, z=-9.25], EntitySpider['Spider'/9040, l='MpServer', x=-84.50, y=25.00, z=85.50], EntitySkeleton['Skeleton'/9058, l='MpServer', x=7.50, y=23.00, z=99.50], EntityCreeper['Creeper'/9091, l='MpServer', x=-81.50, y=52.00, z=13.50], EntitySkeleton['Skeleton'/9152, l='MpServer', x=-69.50, y=23.00, z=95.50], EntitySquid['Squid'/9250, l='MpServer', x=20.99, y=56.98, z=59.61], EntitySquid['Squid'/9252, l='MpServer', x=19.80, y=58.23, z=68.45], EntitySquid['Squid'/9253, l='MpServer', x=18.30, y=58.33, z=62.43], EntityZombie['Zombie'/9276, l='MpServer', x=1.50, y=19.00, z=10.50], EntityBat['Bat'/9358, l='MpServer', x=-106.77, y=23.10, z=-2.25], EntityBat['Bat'/9360, l='MpServer', x=-96.25, y=16.50, z=23.21], EntityBat['Bat'/9361, l='MpServer', x=29.55, y=35.10, z=8.25], EntityZombie['Zombie'/9385, l='MpServer', x=-109.50, y=14.00, z=15.50], EntityZombie['Zombie'/9386, l='MpServer', x=-108.50, y=14.00, z=12.50], EntityChicken['Chicken'/9402, l='MpServer', x=-106.50, y=29.00, z=100.50], EntityCreeper['Creeper'/9419, l='MpServer', x=-113.50, y=20.00, z=-17.50], EntitySheep['Sheep'/5336, l='MpServer', x=10.50, y=63.00, z=-0.50], EntitySheep['Sheep'/5337, l='MpServer', x=20.21, y=65.00, z=-2.50], EntitySheep['Sheep'/5338, l='MpServer', x=15.50, y=64.00, z=-2.50], EntitySkeleton['Skeleton'/9462, l='MpServer', x=-81.50, y=25.00, z=88.50], EntityCreeper['Creeper'/9518, l='MpServer', x=-89.50, y=16.00, z=18.50], EntityBat['Bat'/9546, l='MpServer', x=-94.75, y=19.10, z=42.26], EntitySkeletonGun['Gun Skeleton'/9581, l='MpServer', x=-71.50, y=32.00, z=45.50], EntityZombie['Zombie'/9596, l='MpServer', x=5.50, y=26.00, z=35.50], EntityCreeper['Creeper'/9633, l='MpServer', x=-78.50, y=40.00, z=59.50], EntitySkeleton['Skeleton'/9634, l='MpServer', x=-83.50, y=40.00, z=63.50], EntityZombie['Zombie'/9638, l='MpServer', x=14.50, y=24.00, z=93.50], EntityBat['Bat'/9668, l='MpServer', x=12.02, y=23.73, z=95.51], EntityBat['Bat'/9677, l='MpServer', x=-1.93, y=25.64, z=27.75], EntityBat['Bat'/9678, l='MpServer', x=0.36, y=25.92, z=30.32], EntitySkeleton['Skeleton'/9687, l='MpServer', x=-109.52, y=23.00, z=-25.10], EntityZombie['Zombie'/9728, l='MpServer', x=-79.50, y=40.00, z=65.50], EntityCreeper['Creeper'/9742, l='MpServer', x=-32.50, y=19.00, z=-42.50], EntityCreeper['Creeper'/9743, l='MpServer', x=-33.50, y=19.00, z=-41.50], EntityPlayerSP['<PROFILE NAME>'/1378, l='MpServer', x=-35.18, y=69.00, z=21.73], EntityItem['item.item.reeds'/6131, l='MpServer', x=5.67, y=63.00, z=-0.50], EntityItem['item.item.reeds'/6132, l='MpServer', x=7.31, y=63.00, z=-0.21], EntityItem['item.item.reeds'/6133, l='MpServer', x=6.54, y=63.00, z=-0.87], EntityItem['item.item.reeds'/6134, l='MpServer', x=8.49, y=63.00, z=-0.98], EntityItem['item.item.reeds'/6135, l='MpServer', x=10.11, y=63.00, z=-1.74]]
	Retry entities: 0 total; []
	Server brand: fml,forge
	Server type: Integrated singleplayer server
Stacktrace:
	at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:415)
	at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2660)
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:392)
	at net.minecraft.client.main.Main.main(SourceFile:124)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:191)
	at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:252)
	at org.multimc.EntryPoint.listen(EntryPoint.java:162)
	at org.multimc.EntryPoint.main(EntryPoint.java:53)