Oh no! It's gone. It may be an issue of the pic no longer being available on the site where it was posted. If you find the background, and save the pic, you can then upload it to your own address to keep for safe keeping. That should eliminate any issues dependant on the person who created the background. Hope this helps. If not, let me know, and I'll try to help.
I couldn't find the image. Clouds are fine for now.