Error code 330 in Aadhaar card authentication indicates that the Aadhaar holder's biometrics are locked. This error occurs when a UID is used to invoke an authentication service that uses a biometric modality, such as fingerprint, iris, or face.
Here are some things you can try to fix Aadhaar card authentication errors:
Ensure the correct Aadhaar number is entered
Try authenticating again with another finger
Make sure your finger is placed correctly
Ensure your fingers are clean
Make sure your finger is not very dry
Ensure the fingerprint scanner is clean
Remove any hats, glasses, or other coverings that might obscure your facial features
