What error do you get when you go to the site? I wonder if your IP address changed and you got a IP of someone who is banned. Also, what IP do you get when you ping the website? Trying to rule out DNS.
Thank you for the response. The message with any browser or tablet is: ERR_CONNECTION_TIMED_OUT. I think you might be right, I got assigned a banned IP. Anyway, the workaround with the phone works if I ever need to visit the site.
Another option is to use a browser with a built in VPN like Opera. I use Opera GX and enjoy it. If it really bugged you, you could change/clone your WAN MAC address and reboot your modem to try to get a different IP address. This would NOT work on a modem/router combo like Cox's Panoramic gateway though.