Hi @nitishlamba1 

This is different scenario however try below option - 

Sometimes VEC on certain browsers, such as Firefox, might block a page from displaying in the VEC if the page contains mixed content (for example, a non-secure page in a secure site). If your page does not display, click the icon next to the URL in the browser address bar and click Disable protection on this page.

For Chrome,  Click on the Lock icon in URL bar -> Site Settings -> Looks for Insecure content and from option just select Allow.  

This issue does not affect the display of your pages to site visitors.

Hopefully this will resolve the issues you're facing.