Unable to connect to world
io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection timed out: No further information.
That is weird because he can connect to my world but I can't connect to his. I tried everything. I told him to make a server and deleted mine. Nothing works. (Also I used the Better Loading Screen mod which is why the image looks weird.)
Check your firewall, ports 17000-18000 should be opened. And use this manual https://radmin-club.com/minecraft/lan-for-minecraft/