'Shutting down internal server'

I have played ftb revelations for quite some time without any real issues, but suddenly my game crashed and now i cant seem to get into the world. As soon as i start up the world i get the message shutting down internal server, the crashlog is posted underneath this. I hope you guys can help. 

Description: Unexpected error

java.lang.NullPointerException: Unexpected error
    at net.minecraftforge.client.ForgeHooksClient.handlePerspective(ForgeHooksClient.java:927)
    at net.minecraft.client.renderer.block.model.IBakedModel.handlePerspective(IBakedModel.java:36)
    at net.minecraftforge.client.ForgeHooksClient.handleCameraTransforms(ForgeHooksClient.java:427)
    at p455w0rd.danknull.client.render.DankNullRenderer.func_192838_a(DankNullRenderer.java:181)
    at net.minecraft.client.renderer.tileentity.TileEntityItemStackRenderer.func_179022_a(TileEntityItemStackRenderer.java:45)
    at net.minecraft.client.renderer.RenderItem.func_180454_a(RenderItem.java:145)
    at net.minecraft.client.renderer.RenderItem.func_184394_a(RenderItem.java:275)
    at net.minecraft.client.renderer.RenderItem.func_184392_a(RenderItem.java:256)
    at codechicken.lib.render.item.CCRenderItem.func_184392_a(CCRenderItem.java:305)
    at net.minecraft.client.renderer.ItemRenderer.func_187462_a(ItemRenderer.java:75)
    at net.minecraft.client.renderer.ItemRenderer.func_187457_a(ItemRenderer.java:432)
    at net.minecraft.client.renderer.ItemRenderer.func_78440_a(ItemRenderer.java:333)
    at net.minecraft.client.renderer.EntityRenderer.func_78476_b(EntityRenderer.java:776)
    at net.minecraft.client.renderer.EntityRenderer.func_175068_a(EntityRenderer.java:1439)
    at net.minecraft.client.renderer.EntityRenderer.func_78471_a(EntityRenderer.java:1259)
    at net.minecraft.client.renderer.EntityRenderer.func_181560_a(EntityRenderer.java:1062)
    at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1119)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:398)
    at net.minecraft.client.main.Main.main(SourceFile:123)
    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:497)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

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

-- Head --
Thread: Client thread
Stacktrace:
    at net.minecraftforge.client.ForgeHooksClient.handlePerspective(ForgeHooksClient.java:927)
    at net.minecraft.client.renderer.block.model.IBakedModel.handlePerspective(IBakedModel.java:36)
    at net.minecraftforge.client.ForgeHooksClient.handleCameraTransforms(ForgeHooksClient.java:427)
    at p455w0rd.danknull.client.render.DankNullRenderer.func_192838_a(DankNullRenderer.java:181)
    at net.minecraft.client.renderer.tileentity.TileEntityItemStackRenderer.func_179022_a(TileEntityItemStackRenderer.java:45)
    at net.minecraft.client.renderer.RenderItem.func_180454_a(RenderItem.java:145)
    at net.minecraft.client.renderer.RenderItem.func_184394_a(RenderItem.java:275)
    at net.minecraft.client.renderer.RenderItem.func_184392_a(RenderItem.java:256)
    at codechicken.lib.render.item.CCRenderItem.func_184392_a(CCRenderItem.java:305)
    at net.minecraft.client.renderer.ItemRenderer.func_187462_a(ItemRenderer.java:75)
    at net.minecraft.client.renderer.ItemRenderer.func_187457_a(ItemRenderer.java:432)
    at net.minecraft.client.renderer.ItemRenderer.func_78440_a(ItemRenderer.java:333)
    at net.minecraft.client.renderer.EntityRenderer.func_78476_b(EntityRenderer.java:776)
    at net.minecraft.client.renderer.EntityRenderer.func_175068_a(EntityRenderer.java:1439)
    at net.minecraft.client.renderer.EntityRenderer.func_78471_a(EntityRenderer.java:1259)

-- Affected level --
Details:
    Level name: MpServer
    All players: 1 total; [EntityPlayerSP['noekpankow'/372, l='MpServer', x=254.55, y=77.00, z=-786.62]]
    Chunk stats: MultiplayerChunkCache: 289, 289
    Level seed: 0
    Level generator: ID 06 - BIOMESOP, ver 0. Features enabled: false
    Level generator options: 
    Level spawn location: World: (-81,64,204), Chunk: (at 15,4,12 in -6,12; contains blocks -96,0,192 to -81,255,207), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
    Level time: 16112858 game time, 20718460 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: survival (ID 0). Hardcore: false. Cheats: false
    Forced entities: 7 total; [EntitySkeletonHorse['Skeleton Horse'/384, l='MpServer', x=289.16, y=70.00, z=-755.16], EntityPlayerSP['noekpankow'/372, l='MpServer', x=254.55, y=77.00, z=-786.62], EntityCartChest['Chest Cart'/374, l='MpServer', x=363.50, y=32.06, z=-733.50], EntityCartChest['Chest Cart'/375, l='MpServer', x=362.50, y=26.06, z=-745.50], EntityXPOrbBig['entity.xp_orb_big.name'/381, l='MpServer', x=261.38, y=35.63, z=-797.38], EntityItem['item.item.bow'/382, l='MpServer', x=264.22, y=32.00, z=-795.39], EntityXPOrbBig['entity.xp_orb_big.name'/383, l='MpServer', x=261.38, y=35.63, z=-793.63]]
    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:420)
    at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2741)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:427)
    at net.minecraft.client.main.Main.main(SourceFile:123)
    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:497)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)