This article addresses an error encountered by users during biometric login where the screen displays Your identity could not be verified.  This device doesn't support the type of security key requested by this website.  The occurrence of this error screen is correlated with instances of the WebAuthn browser error in Auth0 logs.

• Biometrics login
• WebAuthn browser 

The current logging system lacks the ability to differentiate between various types of WebAuthn errors.  As a result, the following scenarios all generate a log with the identical description: "WebAuthn browser error":   

• When a user initiates WebAuthn enrollment and subsequently clicks cancel.    
• When a user who has previously enrolled attempts to use biometrics after clearing their browser data.    
• The documented limitations specify that attempting to enroll more than one biometric authenticator for the same device and browser combination (e.g., two MacBooks using Chrome) will also produce this error.    

The error indicated in the problem statement suggests that the issue is related to the browser or operating system's lack of WebAuthn support.

This error is typically caused by the browser or OS not supporting WebAuthn. See Browser support for more details about browser and OS compatibility.

Related References

• Configure WebAuthn with Device Biometrics for MFA
• Does your current browser support WebAuthn?