I created a Card in CRM extension and I am able to see this card in the dashboard. In the payload from fetch data uri, I speicfy the a iframe in the action and link a external URI "www.google.com". But when I click the action to open the iframe, it shows an error: "www.google.com refused to connect.". I have tired a few different URI but always get this "refused to connect" error. How can I specify a valid url in the iframe?
I'm betting it's because Google doesn't want you to iframe their website. Try it with a website that you have control over i.e. where the X-Frame-Options header is notset to SAMEORIGIN.