For a website hosted by EDIS, you can activate a Let’s Encrypt SSL/TLS certificate in the vHost control panel.
If the request is unavailable, check the DNS records. The domain and every hostname required for the certificate must point to the correct hosting account. Use the IP address shown in your account instead of copying old example addresses.
The original instructions allow approximately 15 minutes for setup. Then check that your website opens with https://. Contact EDIS support if you need help.