java.lang.RuntimeException: PLAYER target expects a Player arg

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java.lang.RuntimeException: PLAYER target expects a Player arg
at net.minecraftforge.fml.common.network.FMLOutboundHandler$OutboundTarget$4.validateArgs(FMLOutboundHandler.java:125)
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:658)
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:716)
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:651)
at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:112)
at io.netty.handler.codec.MessageToMessageCodec.write(MessageToMessageCodec.java:116)
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:658)
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:716)
at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:706)
at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:741)
at io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:895)
at mcp.mobius.waila.network.MessageRequestTile$Handler$1.run(MessageRequestTile.java:112)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at net.minecraft.util.Util.func_181617_a(SourceFile:45)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:668)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:387)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471)
at java.lang.Thread.run(Thread.java:745)

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