Summary Card Image not rendering


Hello, here’s the URL to my Twitter Card Meta info:

Here is the URL to the live image:

But this is the error I’m getting when I place the URL with the Twitter Card Meta info into the Validator:

The card for your website will look a little something like this!
Unable to render Card preview
INFO: Page fetched successfully
INFO: 8 metatags were found
WARN: Not whitelisted

What am I doing wrong?

Thank you.