Error in onPacketInAsync()

[mibby]

2018-01-18 15:39:28
[VERSION]:git-Paper-1305 (MC: 1.12.2), ArtMap v2.6.11
---------------------[SERVER]---------------------
Loaded Plugins: [FastAsyncWorldEdit v18.01.17-17d3e57-983-18.3.8, LiteBans v2.2.6, ArtMap v2.6.11, WorldEdit v6.1.7;dd00bb1, ]
Plugin compatability hooks: Reflection Handler: class me.Fupery.ArtMap.Compatability.VanillaReflectionHandler
--------------------[STACKTRACE]---------------------
null
me.Fupery.ArtMap.Painting.ArtistHandler.containsPlayer(ArtistHandler.java:69)
me.Fupery.ArtMap.IO.Protocol.In.GenericPacketReceiver.onPacketInAsync(GenericPacketReceiver.java:93)
me.Fupery.ArtMap.IO.Protocol.In.GenericPacketReceiver.access$200(GenericPacketReceiver.java:17)
me.Fupery.ArtMap.IO.Protocol.In.GenericPacketReceiver$PacketHandler.channelRead(GenericPacketReceiver.java:106)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:310)
io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:284)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:310)
io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:297)
io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:413)
io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:265)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1359)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:935)
io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:141)
io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:645)
io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:580)
io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:497)
io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:459)
io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:886)
java.lang.Thread.run(Unknown Source)