Why is the interstitial ad page blank?

An interstitial displays its destination inside an iframe. A blank area usually means that no usable destination was selected or that the destination refuses to be embedded.

1. In Simple mode, open Admin > Settings > Ads and confirm that Interstitial Ad URL contains a complete working HTTPS URL.
2. In Campaigns mode, open Admin > Campaigns > List and confirm that an active interstitial campaign matches the visitor country and traffic source, still has inventory, and has a working Website URL.
3. Open the destination URL directly. Then check the browser console for mixed-content errors or responses that use X-Frame-Options or Content Security Policy frame-ancestors.

AdLinkFly cannot override another website's iframe policy. Use a destination that permits embedding or ask the destination owner to adjust its policy. Do not weaken your own website security headers to fix a restriction sent by another website.