Hi,
I was able to upload the file with no problem. I initially downloaded and uploaded, and it worked. Just to be double sure the original file is not to blame, I also downloaded the full icons pack from the Microsoft website, dug out the specific file, and uploaded it to the WordPress website. Both files uploaded without a hitch.
And I could use the uploaded file as the site icon:
So…
It appears the image is not the problem. And WordPress is not the culprit either. Which leaves us with your hosting environment being the likely culprit.
So kindly confirm the following for me:
- What is the EXACT error message you see when you try to upload this file as your site icon?
- Are you able to upload other images (other than this very one) as your site icon?
- Are you able to upload other images in WordPress (eg in Post or Page editor)?