1. Check if the camera is connected properly to your computer if you are using external camera Close all programs that may be using your camera including Skype, instant messengers (Gtalk, Yahoo, facebook, Messenger or Windows Live Messenger), browsers 

2. Please make sure your Internet is not blocked by a restrictive firewall. This could happen if you are trying to answer the Interview within a Corporate Network/LAN , Using your office laptop and using your School/College network. This problem may persist and we recommend you try a different internet connection / access. 

3. Once this is done, please do check if your webcam is working, refresh the browser and check if it working. In case the issue persists, please reach us out to our support number +918067414716. Also raise a ticket with the screenshot of the error. Click here to raise a ticket.