Can you ping the site? If not, try using Pingplotter to trace to the site, to see where it is failing. See here for my pingplotter results for comparison. Site works for me on Frontier fiber east coast.
Are you using Cox DNS? If so, try changing to a alternate DNS on your PC like Google DNS or OpenDNS. I notice some issues with that domain on Speakeasy system. Also saw some problems when I looked at how DNS is set up on the domain in general. Not sure if that is relevant.
If worst comes to worst, use a browser with a built in free VPN like Opera GX.