If you are getting this in your google webmaster:
Then the answer below should help give clarity to the problem.
Your images are indeed being indexed, although they are not being linked to your site within Google Search Console. However, they are being linked to your site in Google Search results.
The reason for this is that aphotofolio's images reside on a CDN which has a separate URL (https://11111.....ssl.cf1.rackcdn.com/filename.jpg).
While Google can find, index, and correctly associate the images with your site, they can't report this information back to your via Google Search Console as you are not a verified owner on those URLs (the URLs on which the images are stored-link above, i.e rackcdn.com).
As long as images are being indexed and associated with your domain, there's no issue or cause for concern. You can do some testing on your end by entering this into a google search box:
site:https://yourdomain.com (obviously replace yourdomain with your actual domain)
And it will show all the images that are indexed on your site.
We've provided some more info on general image info in regards to google.
Fetching, rendering, caching and indexing are all different. Sometimes they're all part of the same process, sometimes not. When Google 'indexes' images, that's primarily for its image search engine (Google Images). 'Indexing' something means that Google is listing that resource within its own search results for one reason or another. For the same reasons that Google rarely indexes all of your web-pages, Google also rarely indexes all of your images.
That doesn't mean that Google 'can't see' your images and has an imperfect view of your web-page. It simply means that Google does not believe the image which you have uploaded are 'worthy' enough to be served to an end-user who is performing a certain search on Google images. If you think that gaining normal web rankings is tricky, remember that most users only utilize Google images for certain (specific) reasons. Maybe they're trying to find a meme to add to their post on a forum thread or as a comment on a Social network. Maybe they're looking for PNG icons to add to their PowerPoint presentations.
If some images on your page, post or website are not indexed - it's not necessarily an 'issue' or 'error'.