Why am I getting a DNS error?

While trying to register my site with Google I received this error: The server at www.saltandlights.com can't be found, because the DNS lookup failed. DNS is the network service that translates a website's name to its Internet address. This error is most often caused by having no connection to the Internet or a misconfigured network. It can also be caused by an unresponsive DNS server or a firewall preventing Google Chrome from accessing the network.
Error code: DNS_PROBE_FINISHED_NXDOMAIN