Iframe integration to quilts

Hi, i'm trying to add iframe as widget to the quilt (custom Blog page) and i do receive an exception in the console Refused to display 'url' in a frame because it set 'X-Frame-Options' to 'deny'.

I tried to include url with secured http and it does not work for me. For example i used that one "https://developer.khoros.com/khoroscommunitydevdocs/changelog"

But what i'm really looking for is to run application from the pages via iframe. For exampe: i do have app folder in sdk plugin contains SPA and i want to run it from iframe inside component like this: