The wayback machine has snapshots of this, including one taken today, June 4. [1] I hope the current error is just something transient and will be resolved soon. I also hope someone has contacts for the website to alert them.
I can see occassionally "503 Service Temporarily Unavailable" errors too. Also DMR's picture is "broken". Maybe the server is temporarily overloaded by the number of visits caused by this post. After all, it's an archived homepage and likely not running on the most performant webserver.
[1]: https://web.archive.org/web/20230000000000*/https://www.bell...