You will sometimes need to allow your camera to use your phone to do the online ID process.
Samsung:
Settings > Apps > Internet (Samsung Internet/Google Chrome) > Permissions > Camera [ON]
iPhone:
Settings > Safari/Google Chrome > Camera [ON]
Oppo:
Settings > Security > App Permissions > Select Internet browser (Chrome) > Camera [ON]
or Settings > App management > as above
Xiaomi:
Settings > System Apps > Chrome/MI Internet (ask for their phones default internet) > App Permission > Camera [ON]
Nokia:
Settings > App and Notification > Chrome > Permissions > Camera [ON]
Huawei;
Settings > App and Notification > Chrome (ask for default internet browser) > Permissions > Camera [ON]