Unhandled Exception: PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 10: , null, null)

[roboticafacil]

I have implemented the code suggested in this tutorial and I get an unhandled exception error (see below):

https://medium.com/flutter-community/flutter-implementing-google-sign-in-71888bca24ed

Maybe there's something I am missing. Great job, anyway...

Launching lib\main.dart on sdk gphone x86 in debug mode...
main.dart:1
Formato de par�metros incorrecto:
√ Built build\app\outputs\flutter-apk\app-debug.apk.
Connecting to VM Service at ws://127.0.0.1:63077/pyQ0NoAYtOI=/ws
I/icafacil.eCrom(10799): Waiting for a blocking GC ProfileSaver
E/flutter (10799): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 10: , null, null)
E/flutter (10799): #0 StandardMethodCodec.decodeEnvelope
message_codecs.dart:653
E/flutter (10799): #1 MethodChannel._invokeMethod
platform_channel.dart:315
E/flutter (10799):
E/flutter (10799): #2 MethodChannel.invokeMapMethod
platform_channel.dart:518
E/flutter (10799):
E/flutter (10799): #3 GoogleSignIn._callMethod
google_sign_in.dart:274
E/flutter (10799):
E/flutter (10799): #4 GoogleSignIn.signIn.isCanceled
google_sign_in.dart:408
E/flutter (10799):
E/flutter (10799):