Players keep getting kicked out of Server

[TheBlackSeraph]

Hey all, i have a Problem

After playing a few minutes i get kicked out of the Server with a fatal error. After that i cant find the Server anymore.

 

[14:18:21] [Netty Client IO #6/ERROR] [FML]: NetworkDispatcher exception
io.netty.handler.codec.DecoderException: java.lang.IndexOutOfBoundsException: readerIndex(87) + length(1) exceeds writerIndex(87): PooledUnsafeDirectByteBuf(ridx: 87, widx: 87, cap: 87)
    at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:442) ~[ByteToMessageDecoder.class:4.1.9.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:248) ~[ByteToMessageDecoder.class:4.1.9.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [AbstractChannelHandlerContext.class:4.1.9.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [AbstractChannelHandlerContext.class:4.1.9.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [AbstractChannelHandlerContext.class:4.1.9.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:293) [ByteToMessageDecoder.class:4.1.9.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:267) [ByteToMessageDecoder.class:4.1.9.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [AbstractChannelHandlerContext.class:4.1.9.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [AbstractChannelHandlerContext.class:4.1.9.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [AbstractChannelHandlerContext.class:4.1.9.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:293) [ByteToMessageDecoder.class:4.1.9.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:280) [ByteToMessageDecoder.class:4.1.9.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:396) [ByteToMessageDecoder.class:4.1.9.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:248) [ByteToMessageDecoder.class:4.1.9.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [AbstractChannelHandlerContext.class:4.1.9.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [AbstractChannelHandlerContext.class:4.1.9.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [AbstractChannelHandlerContext.class:4.1.9.Final]
    at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102) [MessageToMessageDecoder.class:4.1.9.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [AbstractChannelHandlerContext.class:4.1.9.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [AbstractChannelHandlerContext.class:4.1.9.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [AbstractChannelHandlerContext.class:4.1.9.Final]
    at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:287) [IdleStateHandler.class:4.1.9.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [AbstractChannelHandlerContext.class:4.1.9.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [AbstractChannelHandlerContext.class:4.1.9.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [AbstractChannelHandlerContext.class:4.1.9.Final]
    at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334) [DefaultChannelPipeline$HeadContext.class:4.1.9.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [AbstractChannelHandlerContext.class:4.1.9.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [AbstractChannelHandlerContext.class:4.1.9.Final]
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926) [DefaultChannelPipeline.class:4.1.9.Final]
    at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:134) [AbstractNioByteChannel$NioByteUnsafe.class:4.1.9.Final]
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:624) [NioEventLoop.class:4.1.9.Final]
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:559) [NioEventLoop.class:4.1.9.Final]
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:476) [NioEventLoop.class:4.1.9.Final]
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:438) [NioEventLoop.class:4.1.9.Final]
    at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) [SingleThreadEventExecutor$5.class:4.1.9.Final]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_131]
Caused by: java.lang.IndexOutOfBoundsException: readerIndex(87) + length(1) exceeds writerIndex(87): PooledUnsafeDirectByteBuf(ridx: 87, widx: 87, cap: 87)
    at io.netty.buffer.AbstractByteBuf.checkReadableBytes0(AbstractByteBuf.java:1396) ~[AbstractByteBuf.class:4.1.9.Final]
    at io.netty.buffer.AbstractByteBuf.readByte(AbstractByteBuf.java:687) ~[AbstractByteBuf.class:4.1.9.Final]
    at net.minecraft.network.PacketBuffer.readByte(PacketBuffer.java:864) ~[gy.class:?]
    at net.minecraft.network.PacketBuffer.func_150792_a(PacketBuffer.java:201) ~[gy.class:?]
    at net.tangotek.tektopia.TekDataSerializers$1.read(TekDataSerializers.java:26) ~[TekDataSerializers$1.class:1.1.0]
    at net.tangotek.tektopia.TekDataSerializers$1.func_187159_a(TekDataSerializers.java:15) ~[TekDataSerializers$1.class:1.1.0]
    at net.minecraft.network.datasync.EntityDataManager.func_187215_b(EntityDataManager.java:295) ~[nb.class:?]
    at net.minecraft.network.play.server.SPacketEntityMetadata.func_148837_a(SourceFile:31) ~[kd.class:?]
    at net.minecraft.network.NettyPacketDecoder.decode(SourceFile:40) ~[gz.class:?]
    at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:411) ~[ByteToMessageDecoder.class:4.1.9.Final]
    ... 35 more