Can't Upload .png Photos from Windows PC to iCloud Photos Folder or iCloud.com
I can't seem to upload .png photos from my Windows PC to the iCloud Photos folder or iCloud.com. When I try to move a .png photo to the iCloud Photos folder on my Windows PC, it will move to the folder but it never shows up on my iPhone or on the iCloud.com website. When I try to upload the .png photo directly to iCloud.com, the .png photo doesn't show up at all in the window that pops up to search for the photos to upload. It's almost as if iCloud doesn't support .png photos but I know that isn't the case because I can easily download .png photos on my iPhone with no issues and those photos actually do show up in the iCloud Photos folder on my Windows PC and on the iCloud.com website. Any help with this issue is much appreciated.
Windows, Windows 10