Timeouts in iframe communication

Timeouts in iframe communication may be caused by depending on Cross Origin Resource Sharing (CORS)

If your editor uses the iframe CMS connector, or if your editor uses iframe communication to communicate with the hosted page, all resources should be hosted on the same origin. If pages are not hosted on the same origin, some messages sent through postMessage may not arrive. Some browsers may display an error in the console, but not all browsers do this.

To solve this error, refer to the Integrate with a CMS guide to learn how to correctly integrate with a CMS.