You can try to see if following what I did (see below) can help to trigger it to work again.
I checked this by firstly stopping and disabling the service and then trying to get the Turn Windows features on and off panel to populate. It didn't, and remained blank. I then set the service back to Manual. It still showed the service as Stopped, but as soon as I accessed the above features panel, it automatically switched to Started and the panel populated normally.
When making adjustments to service settings, make sure that you do so in an account with administrative privileges.