I did the stated steps, and I still have the exact problem:  seems only the
categories get downloaded but not individual articles (of which there are
hundreds, but right now, I only get 42 files).  

I removed all filters from the Scan Rules, removed English as a language
restriction, and set Modzilla as the Browser ID (couldn't find Chrome as one
of the options).

<https://imgur.com/a/PucvqsF>

Can I do anything else?  Again, the weird thing is these settings work
perfectly well on my other sites, which share the identical theme as
Songsimian.com.  Please help!  Thanks.