How to replace light blocker.

Hi, I was showing off my camera with some friends and one of them accidentally broke it. They pull the light cover out and it took a small piece of plastic with it. What is the easiest way to replace the light cover as I’m not good at using screwdrivers as I tend to strip the screws.

Image of the light cover rolled up (quarter for scale)

Update: Turns out the small piece of plastic was the thing holding the light blocker in place. Fixed it. Link to fix