htaccess make subdirectory 404 page

Hello @pexlechris,
Thank you for the information. To helpp us assist you with this we need every info that we can get. When you say tat te ebooks page is unavailable, can you please expand on that? Is there any message on the page or just blank page?
Is the issue when accessing that page directly with the link you provided or via website?

Now I have your plugin uninstalled. Now the message you take when you try to access https://www.fashionbooksonline.com/ebooks/view/t/1eef412c1b597d6f4658934c8a8fec71?b=PM-EN-Women.pdf is Direct visits are not allowed.
Please sign in to the site of FashionBooksOnline and go to My eBooks page.
When I have your plugin installed and activated this link opens my WP 404 page..
In ebooks folder I have an htaccess with this content:
RewriteEngine On

#forbidden files
RewriteRule .*\.(ini|json)$ – [F,NC,L]
RewriteRule .*\.(pdf)$ – [F,NC,L]

#serve normal files
RewriteCond %{REQUEST_FILENAME} -s [OR]
RewriteCond %{REQUEST_FILENAME} -l [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^.*$ – [NC,L]

RewriteRule ^.*$ index.php [NC,L]
#RewriteRule ^/([^/]+)/([^/]+)/([^/]+)/?$ /index.php?lang=$1&module=$2&action=$3 [L,QSA]

Hello @pexlechris,

Once again I am sorry about the issue you are having. I spoke with the team and it appears that there is some incompatibility with your system.
In order to investigate this further I can only offer you our professional support in Performance>Support . to Investigate the compatibility issue.

I have installed another caching plugin…
But if I can help you to fix the problem , so other users to not faciliate something similar, I can help…

Hello @pexlechris,

Thank you for your patience and your suggestion. As this issue was not reported earlier and we can not replicate it, it means that compatibility issue with your system setup.
If we encounter a similar issue we will make sure to let you know and provide a solution if possible.
Once again thank you for your patience.