My friends and I were starting an all new server, [I'm not the host, if that helps with the following], but one day when I tried to get on, it got stuck at the loading screen and froze, then after about 15 seconds gave me this:
Internal client error: java.net.ConnectException: Connection timed out: connect
I tried other servers and it's the same thing. My friends can still get into the server though.

Any suggestions on how to fix this?

Files: 

CL.png