Album Art not working properly

[Chromaphasia]

I recently decided to download some track art, most went in without a hitch but some did not. Im getting "Invalid picture" instead of the art, and outside the editor, its got the default disc icon. As far as I can tell there are no differences between the broken arts and the working ones, all are the same file type, resolution, everything. The music files are mp3, but i doubt its a problem with the music files.

[Chromaphasia]

Heres some screenshots to illustrate what i mean,
One of the broken images: https://imgur.com/mDN2AZ2

A working one from the same set: https://imgur.com/oIMBgRJ

[sveakul]

Can you provide a link to one of the files that gives the invalid art message?

[Chromaphasia]

Sure, heres one of the files that doesnt work https://drive.google.com/open?id=12TK2RUCyIdA121DuIjo9z4oPx6eyZxA

Edit: I tried to upload one of the images to Imgur to show what the art should be... but it wont upload. I think something must be wrong with the images, despite them appearing to be fine. I might try and slightly alter it, or get it from a different download

[sveakul]

Sure, heres one of the files that doesnt work https://drive.google.com/open?id=12TK2RUCyIdA121DuIjo9z4oPx6eyZxA

I get "The requested URL was not found on this server."