Twitter card error "Failed to get a proxied URL for the image"


#1

Hi! I’ve tried (twice) to approve http://klambo.herokuapp.com/ but i got message:

klambo.herokuapp.com not approved

twitter:image:src
http://klambo.herokuapp.com/static/images/klambo.jpg
Failed to get a proxied URL for the image.

Image is public available.
But before approve request (just about couple of hours ago) testing with the preview tool was done without any errors (no “Failed to get a proxied URL for the image”).
Can anybody help?