java.lang.NoClassDefFoundError: one/flexo/nibbler/registry/NibblerRegistry

gistfile1.txt

---- Minecraft Crash Report ----
// I feel sad now :(

Time: 12/9/17 4:54 PM
Description: There was a severe problem during mod loading that has caused the game to fail

net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from Nibbler (nibbler)
Caused by: java.lang.NoClassDefFoundError: one/flexo/nibbler/registry/NibblerRegistry
	at one.flexo.nibbler.Nibbler.<clinit>(Nibbler.java:46)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:344)
	at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:522)
	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.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
	at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
	at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
	at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
	at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
	at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
	at com.google.common.eventbus.EventBus.post(EventBus.java:217)
	at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:253)
	at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:231)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:483)
	at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
	at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
	at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
	at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
	at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
	at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
	at com.google.common.eventbus.EventBus.post(EventBus.java:217)
	at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:148)
	at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:568)
	at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:231)
	at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:466)
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:377)
	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:483)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.ClassNotFoundException: one.flexo.nibbler.registry.NibblerRegistry
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:101)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 40 more


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

-- System Details --
Details:
	Minecraft Version: 1.12.2
	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: 829291128 bytes (790 MB) / 1166540800 bytes (1112 MB) up to 3817865216 bytes (3641 MB)
	JVM Flags: 4 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4096m -Xms256m -XX:PermSize=256m
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	FML: MCP 9.42 Powered by Forge 14.23.1.2562 6 mods loaded, 6 mods active
	States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

	| State | ID        | Version      | Source                        | Signature                                |
	|:----- |:--------- |:------------ |:----------------------------- |:---------------------------------------- |
	| UC    | minecraft | 1.12.2       | minecraft.jar                 | None                                     |
	| UC    | mcp       | 9.42         | minecraft.jar                 | None                                     |
	| UC    | FML       | 8.0.99.99    | forge-1.12.2-14.23.1.2562.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |
	| UC    | forge     | 14.23.1.2562 | forge-1.12.2-14.23.1.2562.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |
	| UE    | barkbooks | 1.0          | barkbooks-1.12.2-1.0.jar      | None                                     |
	| UE    | nibbler   | 0.2          | nibbler-1.12.2-0.2.jar        | None                                     |

	Loaded coremods (and transformers): 
	GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.6.0 NVIDIA 388.13' Renderer: 'GeForce GTX 550 Ti/PCIe/SSE2'