Error - The returned resource is not an HTML page

The returned resource is not an HTML page

In order for our robots to analyze your page, it is necessary to return an HTML resource which MIME type is "text/html". Our robots are not able to analyze a PDF document or any other type of document.

If it is not an HTML page :

• you can check the type of document returned by accessing it from a browser.
• check the URL entered, a parameter can change the type of the server response