A web-based communication tool failing to recognize a webcam that is confirmed healthy at the OS level points to the browser itself withholding device access or media capability, rather than a hardware or driver fault - which narrows the investigation to the two Prisma Browser control categories that govern exactly those functions. Access & Data Controls is where the Camera control lives; it can be set to Allow or Block access to the device ' s camera on a per-URL, per-application, or per-category basis, and a Block setting here will cause every matching web application to behave precisely as described, with the site unable to access the webcam even though the OS reports it as fully functional. Browser Security Controls is the second area to check because it governs WebRTC, the underlying protocol nearly all browser-based video and audio communication tools depend on to negotiate and carry real-time media streams; setting WebRTC to Block is explicitly documented as breaking video conferencing and communication tools unless their domains are added to an exclusion list, which would also produce the exact symptom reported. Update & Maintenance Controls govern browser and extension update behavior, and Visibility & Analytics Controls govern session recording and reporting - neither category has any bearing on device permissions or real-time media protocol handling, so they can be ruled out as the source of this issue.
Reference: Prisma Access Browser - Access & Data Controls (Camera) and Browser Security Controls (WebRTC).