Webcam not working after MacOS update to version 11.2.1

I have a 16 inch MacBook Pro. The webcam on it was working fine before the update. But since the update, when I open FaceTime, it shows I guess what is the first frame, and that's it - there's no video feed from the webcam, just a dark, static image of the first frame: Has anyone else faced this issue? And how do I fix it? I tried restarting the system a couple of times, but that didn't fix the issue.