Have paid for and downloaded a stock image
image will not open in any program including PS Elements
message = could not complete request is not the right kind of document
If stock images cannot load in PS - what can they???
I just realised - it is a vector .ai I guess for illustrator only
I think this is the issue
users need to deselect vector images from the search
Yes that is the reason you are not ale to load it in Photoshop Elements.
So for this time either you can install the trial version of Photoshop CC or Illustrator CC to open the image and save it in a supportive format like Jpeg.