Check the camera, check the network connection, update the system and applications.

1. Check the camera: Make sure the camera of the device you are using is working properly and there are no obstructions. You can try adjusting the position and angle of the camera to make sure it's aimed at your face.

2. Check the network connection: Face recognition needs to be connected to the Internet for verification. Make sure the device is connected to the Internet and the network connection is stable.

3. Update the system and applications: Ensure that devices and applications are the latest versions to ensure system and application compatibility.