[firebase_auth]: flutter: Verification failed: An internal error has occurred, print and inspect the error details for more information.

[satsachin]

Is there an existing issue for this?

• I have searched the existing issues.

Which plugins are affected?

Auth

Which platforms are affected?

iOS

Description

flutter: Verification failed: An internal error has occurred, print and inspect the error details for more information.

Reproducing the issue

While sending an OTP in iOS its throwing an error "flutter: Verification failed: An internal error has occurred, print and inspect the error details for more information."
i check firebase and apple configuration and its valid.

Firebase Core version

4.1.1

Flutter Version

3.35.5

Relevant Log Output

Verification failed: An internal error has occurred, print and inspect the error details for more information.

Flutter dependencies

Expand Flutter dependencies snippet

Replace this line with the contents of your `flutter pub deps -- --style=compact`.

Additional context and comments

No response

[SelaseKay]

Hi @satsachin, have you allowed SMS usage in your region? If not, go to the settings tab under authentication and add your region to see if it resolves your issue.

[satsachin]

its allowed and working fine on android

[SelaseKay]

Hi @satsachin, I'm unable to reproduce this with the firebase_auth example app. Could you provide a sample code reproducing this issue?

[satsachin]

` Future<Map<String, dynamic>> sendOTP(String mobileNumber) async {
try {
// Clean and validate mobile number
final cleanNumber = ValidationHelper.cleanMobileNumber(mobileNumber);

  // Use the number as-is (already includes country code if needed)
  String formattedNumber = cleanNumber;
  
  debugLogs('Sending OTP to: $formattedNumber');
  
  // Use a completer to wait for the callback
  final completer = Completer<Map<String, dynamic>>();
  
  // Send OTP via Firebase
  await _authService.sendOTP(
    phoneNumber: "${AppConstants.defaultCountryCode}$formattedNumber",
    onCodeSent: (String verificationId, int? resendToken) {
      _verificationId = verificationId;
      _resendToken = resendToken;
      
      if (!completer.isCompleted) {
        completer.complete({
          'success': true,
          'message': S.current.auth_success_otp_sent,
          'mobile': cleanNumber,
          'verificationId': verificationId,
        });
      }
    },
    onError: (String error) {
      if (!completer.isCompleted) {
        completer.complete({
          'success': false,
          'message': error,
          'mobile': cleanNumber,
        });
      }
    },
    onAutoVerify: (credential) async {
      // Handle auto verification (Android only)
      try {
        final userCredential = await _authService.signInWithCredential(credential);
        if (!completer.isCompleted) {
          completer.complete({
            'success': true,
            'message': S.current.auth_error_phone_verified_automatically,
            'mobile': cleanNumber,
            'autoVerified': true,
            'user': userCredential.user,
            'userId': userCredential.user?.uid,
          });
        }
      } catch (e) {
        if (!completer.isCompleted) {
          completer.complete({
            'success': false,
            'message': S.current.auth_error_auto_verification_failed,
            'error': e.toString(),
          });
        }
      }
    },
  );
  
  // Wait for the callback with a timeout
  return await completer.future.timeout(
    const Duration(seconds: 60),
    onTimeout: () {
      return {
        'success': false,
        'message': S.current.auth_error_request_timeout,
      };
    },
  );
} catch (e) {
  debugLogs('Error in sendOTP: $e');
  return {
    'success': false,
    'message': S.current.error_failed_send_otp,
    'error': e.toString(),
  };
}

}
`

@SelaseKay its going onError