Oh yeah but they're not posted as a png, they're made into a .zip. I asume there is some data saved behind that image which get lost when posting it somewhere directly but gets kept inside that .zip
Ah then I'm not sure. I downloaded the zip file with the card and placed it in the folder. It might be your browser changing the name or format of the card when you download it.
Try downloading one of the cards from above and changing it's name to what it is originally for the download with .png as the format. For example the card you download is "AC_F_20250929135900419.png" without the quotations of course, then make sure to name it that with the .png extension at the end.
Also if you haven't done it yet, go into any of your folders that you browse through in general, click on the view tab at top of the folder and check "File Name Extension" so you can edit the format or extension of the file by just renaming it with .png at the end. It makes things a lot easier.
I use to have this problem when I used Firefox some couple years ago. Every time I would download almost any file it would either change the format and naming of the file I would download or make it completely not what it was suppose to be and I had to change the name and format back to what it's suppose to be by renaming it.
You could always try using a different browser to download the cards as well to see if there's any difference.
If the downloaded img is still saving as the correct format with the name and .png at the end and it's just not reading then I'm not sure. I've never seen that problem before. Like the file not having write or read permissions or something and keeps that permission when it's zipped up so it only effects the zip folder?