The DataPage is not enabled for external access. Enable external access to the DataPage by following the below steps:

In your Caspio Bridge, on the DataPages listing, select your DataPage. Click Deploy.

In order to choose a deployment method and activate other functionalities on the deploy screen, click the Enabled button for the Deployment Status.

Click Close. If you just close the dialog without clicking on the Enabled button, the DataPage will not be deployed and cannot be accessed externally.