Either the website is stopped or the requested domain name is not configured for any website:
https://wwhsredev.health.nsw.gov.au:443/content/key-features-wwhs-redevelopment
If you're an administrator of this site, you need to go to
Sites
and make sure the following domain name is configured either in the site properties or a domain alias of a running web site:
wwhsredev.health.nsw.gov.au:443