java.lang.NullPointerException: null

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java.lang.NullPointerException: null
at io.atomix.catalyst.transport.netty.NettyTls.loadKeystore(NettyTls.java:90)
at io.atomix.catalyst.transport.netty.NettyTls.initSslEngine(NettyTls.java:59)
at io.atomix.catalyst.transport.netty.NettyServer$1.initChannel(NettyServer.java:101)
at io.atomix.catalyst.transport.netty.NettyServer$1.initChannel(NettyServer.java:96)
at io.netty.channel.ChannelInitializer.channelRegistered(ChannelInitializer.java:68)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRegistered(AbstractChannelHandlerContext.java:143)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRegistered(AbstractChannelHandlerContext.java:129)
at io.netty.channel.DefaultChannelPipeline.fireChannelRegistered(DefaultChannelPipeline.java:733)
at io.netty.channel.AbstractChannel$AbstractUnsafe.register0(AbstractChannel.java:450)
at io.netty.channel.AbstractChannel$AbstractUnsafe.access$100(AbstractChannel.java:378)
at io.netty.channel.AbstractChannel$AbstractUnsafe$1.run(AbstractChannel.java:424)
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:358)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:357)
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112)
at java.lang.Thread.run(Thread.java:745)

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