Flutter App: How to solve Google Login Error 12500 12500

When you add sign-in from google feature in your android (flutter/ react-native / ionic) app . You will probably face this exception error 12500 . Most of the time you miss some settings in your firebase or google cloud. But sometimes errors show up when you change your system (laptop/computer) . Let’s fix the flutter Google Sign in Plugin 12500 Error .

When you run the app at the debug console you will see a message.Local module descriptor class for not found. Exception detail:

PlatformException(sign\_in\_failed, 12500: , null, null)
Exception code is sign\_in\_failed
Exception value is: 12500:
![Ezoic](/storage/books/flutter-how-to-solve-google-login-error/images/image1.png "ezoic")

In this Article

Solution 1 – Add support mail to Firebase Project

If you are using firebase inside your project, please make sure you have added the support email.

Go to the Project Settings

Go to the Public settings section

Add the support email address

Change Support Email in Firebase

Let’s see how you can change the support email of the firebase project. You can select any admin mail from the dropdown. For a new email

Go to the Users and Permissions  section in Project settings

Add a member from here

Member email will be shown on the dropdown then select it.

Maybe you don’t want to share your email  here and you have to remove 12500 errors .

For that, you can create a google group and create emails for that group. That email will also show here so you can select it.

You just change the mail but you still have this error. Let’s solve the 12500 Exception  with this solution.

Solution 2 – Have an Emulator with Play Store support

You are using an android emulator  to test your flutter app. Most emulators available at android studio avd manager  don’t have Play Store support.

Please check your emulator. Does it support the play store? If Yes then you are good to go because most of the time we get 12500:  Error when our emulator did not have Play Store support.

Please, Install a new emulator with play store support.

Run your flutter app.

Did your error go away?

If not yet consider this solution

Solution 3 – Add SHA1 Key  to Your Project

You need to add SHA1 Key inside firebase Project OR Google Cloud Credentials.

How to add SHA1 Key android signing in Firebase

Open Firebase

Go to Project Settings

Move to the bottom section where you see the apps that you have configured. If not then Configure your flutter app with firebase first.

Now, you see your android apps here.

You can see the field of SHA certificate fingerprints

Here you place the generated SHA-1 code

Now the question is How to SHA certificate fingerprints  for our android app

Let’s see the app signing process

Go your flutter terminal inside your project and type

cd android

Now execute

./gradlew signingReport

You can see certificates of Gradle singingReport

Use the SHA-1  code from the first section debug version and add it to the firebase settings.

Most Importantly download the latest version of google-service.json  from the firebase.

And place it up inside the android project app folder.

Save firebase

Now with this method, your Error 10  will also be removed.


Run flutter clean


flutter pub get

Again build the project. And check the error status. Hopefully, Error 12500  will be removed.

Solution 4 – Setup Google Cloud OAuth Consent Screen

Check your google cloud console that the OAuth consent screen is configured or not.

Fill up all the required fields.

And save.

If you place your SHA-1 Key  in the “firestore” then your cloud credentials are automatically generated. We don’t need to especially create one.

Again build the project

Your error 12500:  should be resolved.

Solution 5 – Enable Google Sign Method inside firebase Authentication

If you are using firebase authentication somehow. Then please check the Sing-in Method Google is enabled.

Again Clean and run the flutter app you will see that 12500 Error  solved


Hopefully by following the above solutions your sign_in_failed, 12500:  issue will be resolved.

Ref : Flutter: How to solve Google Login Error

aung thu oo



Ko Aung Thu Oo

Having over 15 years of working experience in Laravel, PHP, Flutter, Node.Js, Vue.JS, JAVA. Strong information technology professional with a degree i...

View detail