Usually, if you are stuck on the selfie verification page, it means that you either did not grant the permission to your browser to use the camera on your device.
Also, you might be using Proxy/VPN or Browser Extensions like AdBlock or any other software which can block some content on the Internet or hide your location.
We advise you to check your permissions in your device's settings and disable any browser extensions prior to attempting a selfie verification.
Also, you can try to open the verification page in incognito mode, in a different browser, or on a different device.