'utf-8' codec can't decode byte 0xff in position 14: invalid start byte

[edm0322]

Hi. I get issue if ping from server to client.
I'm getting an error like the one in the title, how do I fix it?
I'm using 1 server and 2 clients, and I'm getting an error like the title when I have 2 clients.

[LopeKinz]

i made a maintained fork : https://github.com/LopeKinz/Python-Botnet