Warning : master server registration failed: failed pinging server

[blooalex18]

Alright so every time I try starting my server, I keep getting this error message. Warning : master server registration failed: failed pinging server. I've asked couple of guys on the iRC chat to help me out but they weren't able to figure it out either. Can anyone help me fix this problem? Btw, I use a Mac book. Also, if possible, can anyone help me by using teamviewer? <~~ If that's easier