Google Sign in Error 12500

Google Sign In error 12500

Error PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 12500: , null)

This 12500 Error can be solved by adding a support email address
to your project in project settings. Open link
https://console.firebase.google.com/

Select Your project and open settings tab.

Provide a valid support email and restart your application now.

Android Google Sign In Failed com.google.android.gms.common.api.ApiException: 12500

I faced the exact same issue. This is what I did. First of all I ensured that I have latest google-services.json file in my project. Then I checked that the string key that I pass into the GoogleSignInOptions builder matches with the OAuth web client key in the GCP console.

Lastly, I updated my Google Play Services and the Google Repository (from the SDK Manager) to the latest version.

Updating the Google Repository seems to have done the trick for me.

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