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java.lang.NullPointerException: 	at java.util.concurrent.ConcurrentHashMap.putVal(ConcurrentHashMap.java:1011)	at java.util.concurrent.ConcurrentHashMap.put(ConcurrentHashMap.java:1006)	at protocolsupport.protocol.storage.ProtocolStorage.setProtocolVersion(ProtocolStorage.java:13)	at protocolsupport.protocol.pipeline.initial.InitialPacketDecoder.setProtocol(InitialPacketDecoder.java:156)	at protocolsupport.protocol.pipeline.initial.InitialPacketDecoder.decode(InitialPacketDecoder.java:145)	at protocolsupport.protocol.pipeline.initial.InitialPacketDecoder.channelRead0(InitialPacketDecoder.java:97)	at protocolsupport.protocol.pipeline.initial.InitialPacketDecoder.channelRead0(InitialPacketDecoder.java:27)	at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)	at protocolsupport.protocol.pipeline.timeout.SimpleReadTimeoutHandler.channelRead(SimpleReadTimeoutHandler.java:39)	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:787)	at io.netty.channel.epoll.EpollSocketChannel$EpollSocketUnsafe.epollInReady(EpollSocketChannel.java:722)	at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:326)	at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:264)	at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)	at java.lang.Thread.run(Thread.java:745)