[18:01:36] [Client thread/FATAL]: Unreported exception thrown!
java.lang.ExceptionInInitializerError
	at ed.enderdeath.mod.AnvilDragon.ContainerDragonAnvil.onCraftMatrixChanged(ContainerDragonAnvil.java:77) ~[ContainerDragonAnvil.class:?]
	at net.minecraft.inventory.InventoryCrafting.setInventorySlotContents(InventoryCrafting.java:132) ~[InventoryCrafting.class:?]
	at net.minecraft.inventory.Slot.putStack(Slot.java:104) ~[Slot.class:?]
	at net.minecraft.inventory.Container.putStacksInSlots(Container.java:558) ~[Container.class:?]
	at net.minecraft.client.network.NetHandlerPlayClient.handleWindowItems(NetHandlerPlayClient.java:1202) ~[NetHandlerPlayClient.class:?]
	at net.minecraft.network.play.server.S30PacketWindowItems.processPacket(S30PacketWindowItems.java:70) ~[S30PacketWindowItems.class:?]
	at net.minecraft.network.play.server.S30PacketWindowItems.processPacket(S30PacketWindowItems.java:78) ~[S30PacketWindowItems.class:?]
	at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:241) ~[NetworkManager.class:?]
	at net.minecraft.client.multiplayer.PlayerControllerMP.updateController(PlayerControllerMP.java:317) ~[PlayerControllerMP.class:?]
	at net.minecraft.client.Minecraft.runTick(Minecraft.java:1693) ~[Minecraft.class:?]
	at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1039) ~[Minecraft.class:?]
	at net.minecraft.client.Minecraft.run(Minecraft.java:962) [Minecraft.class:?]
	at net.minecraft.client.main.Main.main(Main.java:164) [Main.class:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_91]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_91]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?: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 net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source) [start/:?]
	at GradleStart.main(Unknown Source) [start/:?]
Caused by: java.lang.NullPointerException
	at ed.enderdeath.mod.AnvilDragon.TutorielCraftingManager.<init>(TutorielCraftingManager.java:32) ~[TutorielCraftingManager.class:?]
	at ed.enderdeath.mod.AnvilDragon.TutorielCraftingManager.<clinit>(TutorielCraftingManager.java:20) ~[TutorielCraftingManager.class:?]
	... 21 more
[18:01:36] [Client thread/INFO] [STDOUT]: [net.minecraft.client.Minecraft:displayCrashReport:388]: ---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 05/07/16 18:01
Description: Unexpected error

java.lang.ExceptionInInitializerError
	at ed.enderdeath.mod.AnvilDragon.ContainerDragonAnvil.onCraftMatrixChanged(ContainerDragonAnvil.java:77)
	at net.minecraft.inventory.InventoryCrafting.setInventorySlotContents(InventoryCrafting.java:132)
	at net.minecraft.inventory.Slot.putStack(Slot.java:104)
	at net.minecraft.inventory.Container.putStacksInSlots(Container.java:558)
	at net.minecraft.client.network.NetHandlerPlayClient.handleWindowItems(NetHandlerPlayClient.java:1202)
	at net.minecraft.network.play.server.S30PacketWindowItems.processPacket(S30PacketWindowItems.java:70)
	at net.minecraft.network.play.server.S30PacketWindowItems.processPacket(S30PacketWindowItems.java:78)
	at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:241)
	at net.minecraft.client.multiplayer.PlayerControllerMP.updateController(PlayerControllerMP.java:317)
	at net.minecraft.client.Minecraft.runTick(Minecraft.java:1693)
	at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1039)
	at net.minecraft.client.Minecraft.run(Minecraft.java:962)
	at net.minecraft.client.main.Main.main(Main.java:164)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
	at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source)
	at GradleStart.main(Unknown Source)
Caused by: java.lang.NullPointerException
	at ed.enderdeath.mod.AnvilDragon.TutorielCraftingManager.<init>(TutorielCraftingManager.java:32)
	at ed.enderdeath.mod.AnvilDragon.TutorielCraftingManager.<clinit>(TutorielCraftingManager.java:20)
	... 21 more


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

-- Head --
Stacktrace:
	at ed.enderdeath.mod.AnvilDragon.ContainerDragonAnvil.onCraftMatrixChanged(ContainerDragonAnvil.java:77)
	at net.minecraft.inventory.InventoryCrafting.setInventorySlotContents(InventoryCrafting.java:132)
	at net.minecraft.inventory.Slot.putStack(Slot.java:104)
	at net.minecraft.inventory.Container.putStacksInSlots(Container.java:558)
	at net.minecraft.client.network.NetHandlerPlayClient.handleWindowItems(NetHandlerPlayClient.java:1202)
	at net.minecraft.network.play.server.S30PacketWindowItems.processPacket(S30PacketWindowItems.java:70)
	at net.minecraft.network.play.server.S30PacketWindowItems.processPacket(S30PacketWindowItems.java:78)
	at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:241)
	at net.minecraft.client.multiplayer.PlayerControllerMP.updateController(PlayerControllerMP.java:317)