trying to implement Twitter cards on my website. I have used the below sample code and filled in the relevant information specific to my webpage.
This is a link to the web page in question: http://bocamag.com/blog/2016/09/23/taste-wines-of-the-andes-with-noted-wine-critic-james-suckling/
It is unable to render a preview and also says that I have not been whitelisted. Any help would be greatly appreciated