Hello Can I ask my friend problem here? My friend He can't join anyone server even Lan server It show this "Failed to connected io.netty.channel.abstractchannel$annotatedconnectexception connection timed out" Did you know how to fix it?

Have you tried reinstalling? Did you check your versions? Try with the Firewall off on both PCs in LAN (switch it back on after trying!), then maybe open required ports.

Thank you for answer me I will try it

Okay issue is solve now. Thank you very much! :)

Reinstalling helped?

nope it doesn't help it's because port