No image in card, robots.txt whitelisting error


I am trying to get twitter cards working on my site:
When I run a url through validator I get some content, but no image. I also get a robots.txt error and another one saying the site is not whitelisted.
Please help.
Here the url I’m running through validator(but I’ve used others as well):

INFO: Page fetched successfully
INFO: 23 metatags were found
INFO: twitter:card = product tag found
ERROR: Blocked by robots.txt (twitter:image)
WARN: Not whitelisted


First of all I’d suggest that the Product card is probably not right for what you are trying to present here - why not use e.g. a Summary Large Image card instead?

It seems like the site where your images are hosted doesn’t have a robots.txt file that allows Twitterbot to access the image?