When we look at this url on flynax demo, it show 404 error, which is OK
https://classifieds.demoflynax.com/files/07-2016/ad3/

But on my site for example:
https://domain.com/files/09-2019/ad1414/
It show as in screenshot for example
Screen Shot 2020-09-06 at 4.41.09 PM.png

How do I make that show 404 error instead of showing all file in that folders? These folders are auto generated when new listing is added

Thanks