In the help center page, there is a description below the search box as:

For more information, also see posts on Code Review meta tagged with [faq].

When clicked on the [faq] link, it returns the Insecure Connection error.

Currently the [faq] link is linked with the URL

https://meta.codereview.stackexchange.com/questions/tagged/faq?sort=votes

but this URL need to be change as

https://codereview.meta.stackexchange.com/questions/tagged/faq?sort=votes

Screenshot for reference: