I wish to embed an I-Frame of an external website on Ghost. Is there any way I can do this? When I try pasting the website link in as an HTML i-frame card it doesn’t work. I’ve heard Ghost blocks iframes it doesn’t recognize, but is there any way for me to make a custom integration or anything like that so I can use special iframes?
Does your iframe not work in the editor or on your published post? The editor doesn’t load frames or execute scripts
Could you share the URL to your post? That screen usually suggests Chrome can’t connect to the requested site; I can give you a much better answer by looking at the post (or the preview) 
Unfortunately I’m just testing out locally so I don’t have a URL to my blog yet. But I noticed that the JS error I get when I load the page is this:
Refused to display ‘Get Started with Groupon’ in a frame because it set ‘X-Frame-Options’ to ‘sameorigin’.
The error you’re seeing is from Groupon - they’re telling the browser not to allow their site to be embedded in a frame, so the browser is preventing it from loading