WARNING: coremods are present:
LoadingPlugin (HardcoreDarkness-MC1.9-1.8.jar)
PixelCamTilt (pixelcam-mc1.9-1.0.jar)
ItemPatchingLoader (ItemPhysic Full 1.3 mc1.9.jar)
FMLPlugin (InventoryTweaks-1.61-dev-43.jar)
LoadingPlugin (ChunkAnimator-MC1.9-1.1.jar)
ShoulderPlugin (ShoulderSurfing-1.9-1.0.jar)
Contact their authors BEFORE contacting forge

// Don't be sad, have a hug! <3

Time: 5/15/16 1:52 PM
Description: There was a severe problem during mod loading that has caused the game to fail

net.minecraftforge.fml.common.LoaderException: java.lang.IllegalAccessError: tried to access field net.minecraftforge.fml.client.event.ConfigChangedEvent.modID from class lumien.chunkanimator.ChunkAnimator
at net.minecraftforge.fml.common.LoadController.transition(LoadController.java:179)
at net.minecraftforge.fml.common.Loader.initializeMods(Loader.java:772)
at net.minecraftforge.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:316)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:513)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:346)
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:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.IllegalAccessError: tried to access field net.minecraftforge.fml.client.event.ConfigChangedEvent.modID from class lumien.chunkanimator.ChunkAnimator
at lumien.chunkanimator.ChunkAnimator.onConfigChanged(ChunkAnimator.java:43)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_14_ChunkAnimator_onConfigChanged_OnConfigChangedEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:49)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:140)
at code.elix_x.mods.fei.client.jeioverride.JeiReflector.load(JeiReflector.java:157)
at code.elix_x.mods.fei.api.gui.FEIGuiOverride.loadFromProfile(FEIGuiOverride.java:111)
at code.elix_x.mods.fei.api.gui.FEIGuiOverride.changeProfile(FEIGuiOverride.java:40)
at code.elix_x.mods.fei.client.events.FEIGuiOverrideEvents.changeProfile(FEIGuiOverrideEvents.java:18)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_168_FEIGuiOverrideEvents_changeProfile_FEIChangeProfileEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:49)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:140)
at code.elix_x.mods.fei.api.profile.Profile.setCurrentProfile(Profile.java:77)
at code.elix_x.mods.fei.api.profile.Profile.load(Profile.java:156)
at code.elix_x.mods.fei.proxy.ClientProxy.postInit(ClientProxy.java:105)
at code.elix_x.mods.fei.ForeverEnoughItemsBase.postInit(ForeverEnoughItemsBase.java:189)
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:483)
at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:561)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:228)
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:206)
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:483)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:135)
at net.minecraftforge.fml.common.Loader.initializeMods(Loader.java:770)
... 10 more

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

-- System Details --
Details:
Minecraft Version: 1.9
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 1563952464 bytes (1491 MB) / 2134114304 bytes (2035 MB) up to 4281597952 bytes (4083 MB)
JVM Flags: 7 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4G -Xms2G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP 9.23 Powered by Forge 12.16.1.1904 Optifine OptiFine_1.9_HD_U_B1 57 mods loaded, 57 mods active
Loaded coremods (and transformers):
LoadingPlugin (HardcoreDarkness-MC1.9-1.8.jar)
lumien.hardcoredarkness.asm.ClassTransformer
PixelCamTilt (pixelcam-mc1.9-1.0.jar)
com.replaymod.pixelcam.coremod.CameraTiltCT
ItemPatchingLoader (ItemPhysic Full 1.3 mc1.9.jar)
com.creativemd.itemphysic.ItemTransformer
FMLPlugin (InventoryTweaks-1.61-dev-43.jar)
invtweaks.forge.asm.ContainerTransformer
LoadingPlugin (ChunkAnimator-MC1.9-1.1.jar)
lumien.chunkanimator.asm.ClassTransformer
ShoulderPlugin (ShoulderSurfing-1.9-1.0.jar)
com.teamderpy.shouldersurfing.asm.ShoulderTransformations
GL info: ' Vendor: 'Intel' Version: '4.3.0 - Build 10.18.15.4279' Renderer: 'Intel(R) HD Graphics'
OptiFine Version: OptiFine_1.9_HD_U_B1
Render Distance Chunks: 8
Mipmaps: 4
Anisotropic Filtering: 1
Antialiasing: 0
Multitexture: false
Shaders: KUDA-Shaders v6.2.81 - Lite.zip
OpenGlVersion: 4.3.0 - Build 10.18.15.4279
OpenGlRenderer: Intel(R) HD Graphics
OpenGlVendor: Intel
CpuCount: 2

Caused by chunk animator.
@lumien231 Update to latest forge.