Why is my form's iframe incorrectly displaying a blank grey page when viewed?

Overview

Using the HTML editor, you are able to add the source code of your form or any page into the player as an Event. This could be pre, mid or post-roll.

Symptom

When you reach the Event in the player, it shows a blank form - apart from any content that was placed directly inside the Event.

Cause

This is called a "Mixed Content" error. This is when you are on a secure site (one that starts https://) but the iframe is being delivered insecurely (starting http://). You can determine that if you check the browser console and see this message:

Solution

Ensure that both pages are delivered securely over https. To accomplish this, you may need to purchase and install an SSL certificate through a trusted Certificate Authority.