Failed to connect to the server

I got this error code whenever im trying to join my friend server, my friend sever is using Aternos. i try to update my java, create new installation and restart still not work and I don't know how to fix this issues
Failed to connect to the server
Internet Exception: io.nettg.handter.codec.DecoderException:java.lang.IndexOutOfEjoundsException: readerIndex(26) + Length(1) exceeds writerIndex(26): PoledUnsafeDirectByteBuf(ridx: 26, widx: 26, cap: 26)