I found 2 issues that are affecting me. For me, it is down to Google Chrome blocking the JavaScript, so the image is seen as a document. Even if I save the file, I can an error "Not a PNG file", but it is.
None of the above and on 50 different website answers work for me. I clear the cache and reset Photoshop and the Browser. The same error. I come across the article where somebody mention Chrome blocking the JavaScript. That only happens on certain websites. I was able to save the other PNG and open it, just fine. Save it. Not copy. I checked my browser and I had a similar error in Developer Tab:
Chrome apparently does not support the x-png. This is the way that the server sends a picture. That was the Autodesk website.
The files are also saved as WebP format. Chrome is not doing very well when picking up that file. I can save some PNG's, but not the banner with the logo from the Autodesk page. I tried everything, using just Chrome and Photoshop. Nothing. The advice below also doesn't work, or I come out with a similar one.
https://www.hongkiat.com/blog/save-webp-images-as-jpg-or-png/
To save that file I have 2 choices:
1. Use Chrome and save the file that is 7kb large and throws an error that this is not a PNG. When I checked with file reader for images data, there is no metadata. I can open it in Paint 3D and it will open with transparency. Save us PNG and it will be PNG. You can now open it in Photoshop.
- I open Microsoft Edge and try to save it from there. It is a 25kb file (same size as in re-saving it in Paint3D). That opens straight on with transparency.
So. It is a file format WebP and the x-png process that knocks them down.
Why I suddenly lost the capability of copy and save with transparency, I have no idea. I get a few large updates from Microsoft, as I sign up to Insider program. Funny. At the end of the day, I would like to work out, how the file with 2/3 of the missing data, can still open in Paint3D with transparency. Copy/paste just stopped working for me. WebP plugin for Photoshop doesn't work for me too.