Skin file cannot be imported successfully

What I expected to happen was...:
Browse the 64x64 PNG skin file in the 'Add new skin' window in the Minecraft Launcher, and it should be applied.

What actually happened was...:
'Skin images must be 64x64 or 64x32 pixel PNG files.' and no skin file is applied.
The files I browse are 64x64 or 64x32 PNG files that were previously applied without any issues.

Steps to Reproduce:
1. Launch the Minecraft Launcher.
2. Click on 'MINECRAFT: Java Edition'.
3. Click on 'Skins'.
4. Click on '+ New Skin'.
5. Click on 'Browse' next to the SKIN FILE field.
6. Browse for 64x64 or 64x32 PNG files that were previously applied without any issues.
7. A message will appear stating, 'Skin images must be 64x64 or 64x32 pixel PNG files.'