That error is thrown when your server is unable to look up the IP address for Facebook.com or SourceCoast.com. That could be due to a mis-configuration issue or a firewall/security software on your server.
You should contact your hosting provider and let them know that your server needs to make outgoing connections using PHP, those connections need to be able to be over https (secure) and that you're trying to connect to at least the following domains:
https://api.facebook.com/
https://www.sourcecoast.com/
I hope that helps, but if you need more assistance, just let us know.
Thanks,
Alex