org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: net/minecraft/server/Packet

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java.lang.NoClassDefFoundError: org/dynmap/DynmapCommonAPI
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java.lang.NoClassDefFoundError: org/bu kkit/event/player/PlayerListener
java.lang.ClassNotFoundException: net.minecraft.server.Packet
at org.bukkit.plugin.java.PluginClassLoader.findClass0(PluginClassLoader.java:70)
at java.lang.ClassLoader.loadClass(Unknown Source)
at me.desmin88.mobdisguise.MobDisguise.(MobDisguise.java:37)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:173)
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:305)
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:230)
at org.bukkit.craftbukkit.v1_6_R3.CraftServer.loadPlugins(CraftServer.java:241)
at org.bukkit.craftbukkit.v1_6_R3.CraftServer.(CraftServer.java:219)
at net.minecraft.server.v1_6_R3.PlayerList.(PlayerList.java:56)
at net.minecraft.server.v1_6_R3.DedicatedPlayerList.(SourceFile:11)
at net.minecraft.server.v1_6_R3.DedicatedServer.init(DedicatedServer.java:107)
at net.minecraft.server.v1_6_R3.MinecraftServer.run(MinecraftServer.java:393)

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