I assume the inaccessible page you mentioned is shown on the 4th screenshot of yours. The reason you can't access the site (http://dr-bobasecuresites.com/) is because that site simply does not exist. The browser is also saying "we can't connect to the server at dr-bob.securesites.com". I attempted to access from my end, and it's giving me the same error. So it's not just you, but it's not working for everyone.

The Wayback Machine has an archived snapshot of the Dr. Bob site from a few months ago.

https://web.archive.org/web/20250201151832/http://www.dr-bob.org/