Links dont work

Links from the online manual landing page - https://zorro-project.com/manual/ - do not open.

The landing page is https://zorro-project.com/manual/toc.php. Clear the browser cache, this usually helps.

To reproduce:

1. google "zorro manual"

2. click on the very first link : https://zorro-project.com/manual/

3. then click on any linked topic

Bad:
https://zorro-project.com/manual/ (links from this page)
https://zorro-project.com/manual/started.htm (as linked)
https://zorro-project.com/manual/testing.htm (as linked)

Good:
https://zorro-project.com/manual/toc.php
https://zorro-project.com/manual/en/started.htm
https://zorro-project.com/manual/en/testing.htm

Also bad:
From this page: https://zorro-project.com/docs.php
The link "Online Manual" is the first bad link listed earlier: https://zorro-project.com/manual/

Since the online manual is updated, a search functionality on the landing page like the offline help manual would be tremendously helpful. Can it be implemented for the benefit of the entire Zorro community?