epicboss 0.4.0 fails to load in spigot

gistfile1.txt

[11:49:01 INFO]: [EpicBoss Gold Edition] Enabling EpicBoss Gold Edition v0.4.0
[11:49:01 INFO]: EpicBoss Gold Edition 0.4.0 Has Been Enabled!
[11:49:01 ERROR]: Error occurred while enabling EpicBoss Gold Edition v0.4.0 (Is it up to date?)
java.lang.NoClassDefFoundError: net/minecraft/server/v1_6_R3/NBTBase
	at me.ThaH3lper.com.Libs.AttributeHandler.addHealth(AttributeHandler.java:23) ~[?:?]
	at me.ThaH3lper.com.Items.ItemHandler.getItemStack(ItemHandler.java:46) ~[?:?]
	at me.ThaH3lper.com.Items.EpicItems.getItemStack(EpicItems.java:35) ~[?:?]
	at me.ThaH3lper.com.Drops.EpicItemStack.<init>(EpicItemStack.java:30) ~[?:?]
	at me.ThaH3lper.com.Drops.EpicNormal.<init>(EpicNormal.java:26) ~[?:?]
	at me.ThaH3lper.com.SaveLoad.Load.LoadLoots.LoadAllLoot(LoadLoots.java:23) ~[?:?]
	at me.ThaH3lper.com.SaveLoad.LoadSetup.LoadAll(LoadSetup.java:77) ~[?:?]
	at me.ThaH3lper.com.EpicBoss.onEnable(EpicBoss.java:84) ~[?:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:218) ~[spigot.jar:git-Spigot-1223]
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:457) [spigot.jar:git-Spigot-1223]
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:385) [spigot.jar:git-Spigot-1223]
	at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugin(CraftServer.java:302) [spigot.jar:git-Spigot-1223]
	at org.bukkit.craftbukkit.v1_7_R1.CraftServer.enablePlugins(CraftServer.java:284) [spigot.jar:git-Spigot-1223]
	at net.minecraft.server.v1_7_R1.MinecraftServer.m(MinecraftServer.java:348) [spigot.jar:git-Spigot-1223]
	at net.minecraft.server.v1_7_R1.MinecraftServer.g(MinecraftServer.java:325) [spigot.jar:git-Spigot-1223]
	at net.minecraft.server.v1_7_R1.MinecraftServer.a(MinecraftServer.java:281) [spigot.jar:git-Spigot-1223]
	at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.java:186) [spigot.jar:git-Spigot-1223]
	at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:430) [spigot.jar:git-Spigot-1223]
	at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [spigot.jar:git-Spigot-1223]
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_6_R3.NBTBase
	at org.bukkit.plugin.java.PluginClassLoader.findClass0(PluginClassLoader.java:70) ~[spigot.jar:git-Spigot-1223]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:53) ~[spigot.jar:git-Spigot-1223]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.7.0_25]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.7.0_25]
	... 19 more