You may need to delete attached documents/images from your match and add them again, but remove all spaces from the image file names.
Though I’ve got these images dowloaded, but it took over 15 minutes to complete.
Btw, the layout like that might be good for PDFs, but for stage images you better use just the image part and put stage details and briefing into stage description on the website.
Also see Create stages automatically when downloading match from the PractiScore web site