MacBook Air camera not working

Hi,

My MacBook camera is not working on any applications (FaceTime, Photo Booth, zoom, etc). The camera is detected but it's just an unavailable black screen. When I open FaceTime I get a pop up that says "FaceTime has not received any videos from the connected camera. restarting your computer may fix this issue". I've restarted my computer, and I've done the system terminal and many more other options, but nothing is working. The camera was working fine before I updated it.

Thanks!