I believe you mean that "Hidden" refers to a subcategory. One important point
to note: if you paste the main index page or home page link of a website,
HTTrack will go through it step by step. However, the problem arises with
Robots.txt files, as some website owners prevent their sites from being
scraped and mirrored.

It seems your issue is related to this, where you paste a page link, and
HTTrack downloads only that page and not the subcategory page content. To
address this, you should either paste the home page or index link to download
the entire website, or you should paste all the specific page links you want
to be downloaded.

For example, if I want to download two pages from any category of the website
www.mcqsquiz.org, and I only want two pages from the EVERYDAY SCIENCE
category, I would just paste these two links.

<https://mcqsquiz.org/category/ppsc-past-papers/>