java.lang.NoClassDefFoundError: net/minecraft/server/v1_9_R1/Packet

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java.lang.NoClassDefFoundError: net/minecraft/server/v1_9_R1/Packet
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:91)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at net.countercraft.movecraft.async.AsyncManager.run(AsyncManager.java:1525)
at org.bukkit.craftbukkit.v1_10_R1.scheduler.CraftTask.run(CraftTask.java:71)
at org.bukkit.craftbukkit.v1_10_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350)
at net.minecraft.server.v1_10_R1.MinecraftServer.D(MinecraftServer.java:723)
at net.minecraft.server.v1_10_R1.DedicatedServer.D(DedicatedServer.java:400)
at net.minecraft.server.v1_10_R1.MinecraftServer.C(MinecraftServer.java:668)
at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:567)
at java.lang.Thread.run(Thread.java:745)

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