E/FirebaseInstanceId: Token retrieval failed: AUTHENTICATION_FAILED - what changed?

Question

I'm not sure what's going on here, I pulled my recently updated repo and every time I open the app to debug it on an emulator I get E/FirebaseInstanceId: Token retrieval failed: AUTHENTICATION_FAILED as the app loads up the main screen. However this hadn't happened before today so I don't know what could've changed? I deleted the app from the Firebase console and re-added it (through Firebase Assistant), but that didn't fix it either? I've included my build.grade file but I'm not sure what else I need to be looking at, any assistance would be appreciated.

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "com.android.projectrc"
        minSdkVersion 16
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        vectorDrawables.useSupportLibrary = true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation 'com.wdullaer:materialdatetimepicker:3.4.0'
    implementation "org.jetbrains.anko:anko:$anko_version"
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
    implementation 'com.android.support:appcompat-v7:27.0.2'
    implementation 'com.android.support:design:27.0.2'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation 'com.github.bumptech.glide:glide:4.2.0'
    implementation 'com.google.firebase:firebase-auth:11.0.4'
    implementation 'com.google.firebase:firebase-database:11.0.4'
    implementation 'com.google.firebase:firebase-storage:11.0.4'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
}








apply plugin: 'com.google.gms.google-services'

Answer 1

The problem in my case was that the emulator was not connected to internet, seems that is not implicitly connected like the ios simulator.

Answer 2

Using an emulator WITHOUT Google Play will cause this error.

Answer 3

Check if you have internet connection in your emulator. I had the same issue and running emulator like this helped me:

emulator -avd <Avd name> -dns-server 8.8.8.8

Answer 4

My guess is that a new version of the Google Play library has been released and your test device/emulator need update his currently installed version.

Check the Google Play Store app on your device/emulator, make the update, and you should be good to go !