Hey, my friend is very often kicked from the server with errors like this:

• Sending too many packets
• Var int to big
• DecoderException: java.io.IoException: Packet 0/68 (hhpeasashhsaehhaaapaeapas) was larger than I expected, found 16 bytes extra whlist reading packet 68
• DecoderException: Badly compressed packet - size of 50 is below server threshold of 256
• DecoderException: Badly compressed packet - size of 101 is below server threshold of 256
• CorruptedFrameException: length wider than 21-bit

he also recorded two videos of kicking him out:

• https://www.youtube.com/watch?v=FAfnLcEynl0

- https://www.youtube.com/watch?v=GxjcXQdgR9o

uninstalling and installing minecraft and java doesn't help. Kicking him from server on every version of minecraft, on forge, on fabric, on vanilla. Changing the internet doesn't help either. The installed java version on his computer is 1.8 which is as it should be. I'm begging you for help because it's been taking a long time and we can't normally play together because he is kicking him out of the server. Sorry for my poor English, but I'm from Polish.