Google Authentication on iOS and Android - internal error

Running into:

NSLocalizedDescription=An internal error has occurred, print and inspect the error details for more information.,
NSUnderlyingError=0x1c4256e90 {Error Domain=FIRAuthInternalErrorDomain Code=3 "(null)" UserInfo={FIRAuthErrorUserInfoDeserializedResponseKey={
    code = 400;
    errors =     (
                {
            domain = global;
            message = "Error occurs when calling appIdentity.";
            reason = invalid;
        }
    );
    message = "Error occurs when calling appIdentity.";
}}}}

{N} code which is executed on button tap:

  login() {
    console.log('Login tapped');
    firebase.login({
      type: firebase.LoginType.GOOGLE,
    }).then(result => {
      console.log(JSON.stringify(result));
    },
    err => {
      console.log('Error occured');
      console.log(err);
    });
  }

[noumaans]

I was able to find a workaround for the issue, and am documenting it here @EddyVerbruggen in case someone else runs into the same problem. Also, I’m closing the issue since it’s not a bug on the plugin side.

If your Firebase project was created by Actions on Google, delete your project (after backing up important data). Then, create a new Firebase project and link it to your Actions on Google project.

TL;DR

Buggy Flow:

1. Create Actions on Google Project a Implicitly have Actions on Google create a brand new DialogFlow project b Implicitly have DialogFlow create a Firebase project c Implicitly have Firebase create a Google Cloud project
2. Note: None of the projects above are created explicitly – these are all created via Actions on Google
3. Now enable Authentication on Firebase, and only enable Google sign-in provider
4. Download google-services.json and / or GoogleService-Info.plist
5. Add them to Android and iOS sample
6. Execute login through Google in Android or iOS app
7. You will now see the Identity error

Working Flow:

1. Create a Firebase project a. Implicitly have Firebase create a Google Cloud project
2. Create Actions on Google Project
3. Create a DialogFlow project and connect it to Firebase project created in 1
4. Now enable Authentication on Firebase, and only enable Google sign-in provider
5. Download google-services.json and / or GoogleService-Info.plist
6. Add them to Android and iOS sample
7. Execute login through Google in Android or iOS app
8. Authentication works

[rb1250]

Facing same issue, have created project in react-native and everything is working fine but when using testflight build firebase signinwithphonenumber() returns, “An internal error has occured”. Working well with few iOS devices and throwing this error with few devices. Can anyone help me out with this?