URL as HTML mashup

Hi All,

I am new to cloud and trying to integrate a URL ( any URL ) as a HTML mashup. Below are my settings

However in the preview, I am getting an error "This content cannot be displayed in a frame". This is happening with every URL.

Now is there any step I am missing here, or do we need to use "HTML code" to view any webpage. If we need to do this with HTML code, what code do we write in the editor.

Really appreciate the Help.

Regards,

Sandeep