I need help with an error message

I am getting an error when I join own my server it says "Internal Exception: io.netty.handler.codec.DecoderException: java.lang.IndexOutOfBoundsException: readerIndex(32442) + length(1) exceeds writerIndex(32442): UnpooledHeapByteBuf(ridx: 32442, widx: 32442, cap: 32442/32442)". I have restarted the server, minecraft, my pc, i've deleted my playerdata files through the website and through files (by uploading worlds). I don't know what to do, i really wanna know how to join.

It turns out deleting your operator and player data let's you join, but you can't add yourself as an operator back, is this a bug with aternos, if so when will this be fixed.