????

this is what it is saying when i join ali-a's faction server Internal Exception: io.netty.handler.codec.DecoderException: java.lang.IndexOutOfBoundsException: readerIndex(9) + length(1) exceeds writer Index(9): UnpooledHeapByteBuf(ridx: 9. widx: 9, cap:9)

i dont know why this is happening