We’ve received many support requests with this error message and that’s why this article is here. It include a video as well, so you can understand it easily.
This error comes up when you have mismatch in your file url & website url structure.
For example: Your site may use url like: http://www.example.com or https://www.example.com or https://example.com or http://example.com
There’s no issue with any format, you can use any structure of url but what you need to make sure is the file url you provide while creating the shortcode must have the same url structure. Don’t use different url structure.