Mylo, the URL that you are using with the "@" symbol in it is for the preview on FA, and those will never properly link to anything not on their servers.
If you want the image to load, go to the page of the picture you want on FA, click download, and use that URL, the one for the full size image.
You can also click full view, and then right click on the picture and click "copy image location" and get the same URL that way was as well.
If you use the URL for the full (true image), then everything should work.