File type error, when trying to upload pictures to a walmart photo site from photo gallery I get a message unable to upload file type error why is this. At the bottom I also get error on page. Thanks

Having trouble looking at the contents of the individual brain cells.

What file type/extension are you trying to upload? What's allowed? Is it too big?

They are jpg files and they aren't too big

They are jpg files and they aren't too big,these are what is allowed