[21:29:51] [Server thread/WARN]: Failed to handle packet for /92.124.123.0:60458
java.util.NoSuchElementException: packet_handler
    at io.netty.channel.DefaultChannelPipeline.getContextOrDie(DefaultChannelPipeline.java:907) ~[DefaultChannelPipeline.class:?]
    at io.netty.channel.DefaultChannelPipeline.addBefore(DefaultChannelPipeline.java:157) ~[DefaultChannelPipeline.class:?]
    at io.netty.channel.DefaultChannelPipeline.addBefore(DefaultChannelPipeline.java:150) ~[DefaultChannelPipeline.class:?]
    at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.insertIntoChannel(NetworkDispatcher.java:175) ~[NetworkDispatcher.class:?]
    at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.serverToClientHandshake(NetworkDispatcher.java:162) ~[NetworkDispatcher.class:?]
    at net.minecraftforge.fml.common.network.internal.FMLNetworkHandler.fmlServerHandshake(FMLNetworkHandler.java:72) ~[FMLNetworkHandler.class:?]
    at net.minecraft.server.network.NetHandlerLoginServer.func_147326_c(NetHandlerLoginServer.java:137) ~[mk.class:?]
    at net.minecraft.server.network.NetHandlerLoginServer.func_73660_a(NetHandlerLoginServer.java:64) ~[mk.class:?]
    at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:287) ~[er.class:?]
    at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:180) [mh.class:?]
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:743) [MinecraftServer.class:?]
    at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:384) [lh.class:?]
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:624) [MinecraftServer.class:?]
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:482) [MinecraftServer.class:?]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_112]
[21:29:51] [Server thread/INFO]: Enotik01 lost connection: Internal Exception: io.netty.handler.codec.EncoderException: java.io.IOException: Can't serialize unregistered packet
[21:29:51] [Server thread/INFO]: Enotik01 left the game