The Host Not Configured to Serve Web Traffic (1004) error message may temporarily occur if:
a) You just recently activated Cloudflare on your site. Please give it a few minutes or so for the DNS propagation to clear.
b) You signed up through a hosting partner. This message generally goes away after a few minutes or so, similar to (a) above. If the error message does not go away after a short amount of time, please contact your hosting provider for assistance so they can check your site's configuration.