I'm facing an issue with Firebase Phone Authentication in my Android app. When I try to authenticate, I see the following error in the logs:

ForceRecaptchaV2Flow from phoneAuthOptions = false, ForceRecaptchav2Flow from firebaseSettings = false
W/System (27157): Ignoring header X-Firebase-Locale because its value was null.
E/zzb (27157): Failed to initialize reCAPTCHA config: No Recaptcha Enterprise siteKey configured for tenant/project *
W/System (27157): Ignoring header X-Firebase-Locale because its value was null.
I/PlayCore(27157): UID: [12418] PID: [27157] IntegrityService : requestIntegrityToken(IntegrityTokenRequest{nonce=2WSJ5e037AiyKOeVR20qvii2smtI8flclRnpuMm65mw, cloudProjectNumber=551503664846, network=null})
...
E/AndroidRuntime(27157): FATAL EXCEPTION: Firebase Blocking Thread #0
E/AndroidRuntime(27157): Process: com.bestflux.btown, PID: 27157

What I've tried:

• Verified that the reCAPTCHA Enterprise API is enabled in my Google Cloud Console.

• Created a reCAPTCHA Enterprise key in the Google Cloud reCAPTCHA Enterprise dashboard.

• Ensured that my Firebase project is linked to the same Google Cloud project where reCAPTCHA Enterprise is enabled.

• Checked that Phone Authentication is enabled in the Firebase Console under Authentication → Sign-in method → Phone.

• Confirmed that I am using the latest versions of firebase_auth and firebase_core packages.

• Verified that my app’s SHA-1 and SHA-256 fingerprints are correctly added in the Firebase project settings.

• Observed that both ForceRecaptchaV2Flow flags in phoneAuthOptions and firebaseSettings are set to false.

My questions:

• Is there an additional configuration step required to pass the reCAPTCHA Enterprise siteKey to Firebase Authentication, or should this be automatically retrieved?

• Could a misconfiguration between my Firebase project and Google Cloud project cause this error?

• Are there known issues or workarounds with the current Firebase Phone Auth implementation regarding reCAPTCHA Enterprise integration?