I don’t have a solution, but I’ve figured out the exact steps to make it happen (at least on my computer):
- Restart your computer.
- Open File Explorer.
- Double-click a photo. It will open in Photos.
- Close the photo.
- Wait at least 17 minutes.
- Double-click a photo. You’ll get “Not implemented.”
I encourage everyone to go to https://support.microsoft.com/en-us/home/contact and create a service request. If Microsoft has to spend staff resources ($) responding to 300 service requests, they’ll be more likely to fix it. If they hear from no one, they won’t fix it.