Error handling

Troubleshoot connection error

After the preview URL is set up, the Experiences canvas might display a “Your website refused to connect” message.

Connection error

This can happen if:

Your project server is not running.
Your project is running on the wrong port.
Your preview URL is wrongly configured.
Your website has a strict security configuration (Security Header or Content Security Policy (CSP)), which prevents other websites from embedding it.

To troubleshoot this:

Ensure that the project is running and on the correct port.
Confirm if your preview URL is rightly configured.
Reach out to your dev or security team to modify your website security configuration.