My camera is is showing a blank video

[RSio]

I purchased an external camera for my laptop since I am not really impressed with the quality of my built-in camera. When I plugged the new camera in and tried to join a meeting in Zoom, it only showed a blank video/image. I tried to check if the same issue occurs in other applications, and it turned out the issue is only in my Zoom app. All other apps shows the camera is working. I tried to troubleshoot multiple times with the help of google and youtube (uninstall/install driver, uninstall/install Zoom app, etc) and nothing worked.

Can someone help me? Now even my built-in camera isn't working. Just a blank image. ONLY IN ZOOM. Rest of my apps, camera is working fine. I've been joining meetings using my phone since which is really hard.