FL with Sponge 613...

---- Minecraft Crash Report ----
// You should try our sister game, Minceraft!

Time: 9/11/15 9:47 AM
Description: Exception in server tick loop

java.lang.NoClassDefFoundError: org/spongepowered/api/event/state/InitializationEvent
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
    at java.lang.Class.getDeclaredMethods(Class.java:1975)
    at org.spongepowered.mod.plugin.SpongeModPluginContainer.findStateEventHandlers(SpongeModPluginContainer.java:136)
    at org.spongepowered.mod.plugin.SpongeModPluginContainer.constructMod(SpongeModPluginContainer.java:100)
    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 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:212)
    at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:190)
    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 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:119)
    at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:507)
    at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:87)
    at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:355)
    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:117)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:438)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: org.spongepowered.api.event.state.InitializationEvent
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 32 more
Caused by: java.lang.NullPointerException
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:180)
    ... 34 more


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

-- System Details --
Details:
    Minecraft Version: 1.8
    Operating System: Mac OS X (x86_64) version 10.10.5
    Java Version: 1.8.0_60, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 1464955944 bytes (1397 MB) / 1671430144 bytes (1594 MB) up to 1908932608 bytes (1820 MB)
    JVM Flags: 2 total; -Xmx2048M -Xms1536M
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP v9.10 FML v8.0.99.99 Minecraft Forge 11.14.3.1499 8 mods loaded, 8 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
    UC  mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)
    UC  FML{8.0.99.99} [Forge Mod Loader] (forge-1.8-11.14.3.1499.jar)
    UC  Forge{11.14.3.1499} [Minecraft Forge] (forge-1.8-11.14.3.1499.jar)
    UC  Sponge{1.8-1499-2.1DEV-613} [SpongeForge] (minecraft.jar)
    U   flexiblelogin{0.2.3} [FlexibleLogin] (FlexibleLogin.jar)
    U   PermissionsEx{2.0-SNAPSHOT} [PermissionsEx] (PermissionsEx-Sponge (b89).jar)
    U   SpongeEssentialCmds{2.6} [SpongeEssentialCmds] (SpongeEssentialCmds-2.6.jar)
    U   TotalEconomy{1.1.0} [Total Economy] (TotalEconomy-v1.1.0.jar)
    Loaded coremods (and transformers):
SpongeCoremod (unknown)

    Profiler Position: N/A (disabled)
    Is Modded: Definitely; Server brand changed to 'fml,forge'
    Type: Dedicated Server (map_server.txt)