Icons not showing on front page

Hi,

I plan on using Ubooquity for pdf files, I'm running it on a NAS (using Unraid, installed via the Unraid Community App).  On the main page, I see buttons for Comics, Books, Raw Files etc.  I click on Books, which takes me to:

http://192.168.1.234:2202/ubooquity/books/

That page shows the icons at the top (Search, Random, go up one level, settings) and a single button saying Books, but nothing else, should it also show actual covers of specific titles on that page as well?  Currently the rest of the page is blank.  When I click on the Books link on that page (which links to http://192.168.1.234:2202/ubooquity/books/1/) it then shows me icons for each of the pdfs.  Just seems odd to have that intermediate page (/books/) that doesn't show anything beyond the link to books/1/, is that normal behavior?  Also, http://192.168.1.234:2202/ubooquity/books/?random=true works as expected and shows actual icons as I'd expect, but http://192.168.1.234:2202/ubooquity/books/ only shows the one link.  Do I need to correct something, or is this by design?  Thanks!