There are several reasons why you are having issues with the Windows 10 Photos App.
This is followed by a dialogue box giving the message The program cannot be started.
Try reinstalling the app to fix the problem.
Normally, restoring your libraries to default will do the trick.
you could follow the on-screen instructions to fix the app issue.
This will reset the Photos app to the default controls.
Perform a restart to make the changes take effect.
Or it’s possible for you to restore the oldWindows Photo Viewerfrom here.
Check This Video Steps Performed to fix the Windows 10 photo app not working even photos not opening.