I have a Wordpress website in which some of the images do not appear when using [login to view URL] but I know the file is there. I can make it appear if I use [login to view URL] Some similar files work fine. Why do some of these files not appear when they did a while ago? I need someone (a wordpress/php/linux expert) to find the reason and explain to me so that I can correct the website.
Note: The site is hosted on AWS and there is a load balancer sat in front of the Linux server.