I have a similar problem importing from Windows to Windows, and I realize that the problem was the absolute path naming convention used for files. I need to replaced (in any text editor) every instance of my old path to the new one. For example: C:/Users/Rodrigo/my/files was changed to C:/Users/Roy/my/files
Probably you need to do the same for C:/Users/Peter Hubbard/Downloads/Branded 1920x1080_5.jpg and change it to /Users/Peter/Downloads/Branded 1920x1080_5.jpg
Hope this helps.