Documentation contains broken links

Describe the bug

On any page of the LoopBack 4 website, links to any API Docs page are broken. Evidence of the last time this was working correctly is the last good capture by the The Internet Archive (Wayback Machine) was March 22, 2022: https://web.archive.org/web/20230322024014/https://loopback.io/doc/en/lb4/apidocs.index.html

Here is just one example:
On the LoopBack 4 Home Page select API DOCS from the main menu, then LoopBack 4 from the dropdown menu; this navigates to: https://loopback.io/doc/en/lb4/apidocs.index.html; but displays:

Page Not Found
[ Edit this page](https://github.com/strongloop/loopback.io/blob/gh-pages/pages/404.md)
Sorry, but the page you were trying to view does not exist. 

This is similar to another this bug I reported which was never resolved: https://github.com/loopbackio/loopback-next/issues/8990

Logs

No response

Additional information

No response

Reproduction

N/A

Parti dal menu API DOCS della Home Page di LoopBack 4 e confronta la relativa destinazione LoopBack 4 con l’URL apidocs.index.html segnalata. Esamina il contesto delle pagine collegate/404.md e la navigazione della documentazione che produce il link non funzionante. Il lavoro è completato quando il menu API Docs raggiunge una pagina API Docs esistente invece di Page Not Found.