I'm having issues with showing PDF files in Google Doc Viewer as iFrame on my pages. I have been using this option for over a year now. This is the first time we have this problem.
When we loan the page, in most cases, it will show the PDF just fine. But in some cases, the viewer is empty or not loading.
Example of pages attached.
This is a Joomla 3.9.22 and JCE Pro 2.8.18 website.