yo bro, i had the same "Minecraft you're already connected on this proxy" error last week. turns out it was a glitch with the server's proxy settings.
try using a VPN to change your IP address. it worked for me! i used NordVPN, but any free one should do the trick.
also, check if your friend's server is using BungeeCord. if it is, the admin might need to restart it. hope this helps!
try using a VPN to change your IP address. it worked for me! i used NordVPN, but any free one should do the trick.
also, check if your friend's server is using BungeeCord. if it is, the admin might need to restart it. hope this helps!