In case you see a blank image when trying to take the snapshot please make sure if the correct video device is selected in the Configuration menu of the streaming platform and if the browser has access to the video device.
Depending on your preferred browser it will be indicated in the upper right or upper left corner whether the browser has access to the webcam. Opening this menu will also show the default device in use.
If the take photo of your face option remains inactive even after the page and the camera stream is fully loaded, please try to disable all translator and VPN plugins running in your browser before reloading the page and trying again.