Content Card not working

I have installed content Cards but it is not displaying anything, please see the page: https://toyota-hilux-revo.org/trinidad-and-tobago-car-import-export.html

Please see the code here:
<h2>Information about country in Wikipedia</h2>
[contentcards url=”https://en.wikipedia.org/wiki/trinidad_and_tobago”]

Is there anything wrong I’m doing here.

The page I need help with: [log in to see the link]