flutter firebase phone authentication issue with web after build

[karthikreddi]

Phone number auth not working in build release version of flutter web using firebase. No issues before build in flutter web.

Phone number auth not working only after deploying to firebase.

Error code: captcha-check-failed.
main.dart.js:5166 reCAPTCHA check failed. Please try again later.

Followed everything here at: https://firebase.flutter.dev/docs/auth/phone but no use.

Future _verifyPhoneNumberWeb(String number) async {
try {
_confirmationResult = await _firebaseAuth.signInWithPhoneNumber(
number,
);
} on FirebaseAuthException catch (e) {
throw CustomException(_verifyErrorCode(e.code));
} catch (error) {
rethrow;
}
}