Failed resolution of: Lcom/google/firebase/iid/FirebaseInstanceId

[mtrakal]

    implementation 'com.mixpanel.android:mixpanel-android:5.9.1'

    // Firebase
    implementation platform('com.google.firebase:firebase-bom:28.0.1')

    implementation 'com.google.firebase:firebase-messaging'
    implementation "com.google.firebase:firebase-config"
    implementation 'com.google.firebase:firebase-core'
    implementation 'com.google.firebase:firebase-dynamic-links'
    implementation 'com.google.firebase:firebase-auth-ktx'
    implementation 'com.google.firebase:firebase-analytics'
    implementation 'com.google.firebase:firebase-database-ktx'
    implementation 'com.google.firebase:firebase-firestore-ktx'
    implementation 'com.google.firebase:firebase-crashlytics'

Crash on startapp

java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/firebase/iid/FirebaseInstanceId;
        at com.mixpanel.android.mpmetrics.MixpanelFCMMessagingService.init(MixpanelFCMMessagingService.java:84)
        at com.mixpanel.android.mpmetrics.MixpanelAPI.getInstance(MixpanelAPI.java:655)
        at com.mixpanel.android.mpmetrics.MixpanelAPI.getInstance(MixpanelAPI.java:536)
        at myapp.App.onCreate(App.kt:52)

myapp.App.onCreate(App.kt:52):

MixpanelAPI.getInstance(this, BuildConfig.MIXPANEL_TOKEN)

Firebase: 28.0.1 don't contain FirebaseInstanceId at all. It was deprecated a few versions ago. You should use: FirebaseMessaging.getToken() for messaging or FirebaseInstallations for app instance identifiers. More info: https://firebase.google.com/docs/reference/android/com/google/firebase/iid/FirebaseInstanceId

[MDXDave]

You can fix this issue by adding the firebase-iid dependency:

implementation("com.google.firebase:firebase-iid")

[Sanam-Bdr-Gurung]

You can fix this issue by adding the firebase-iid dependency:

implementation("com.google.firebase:firebase-iid")

Thanks for the fix.

[sundardsTechMind]

Add this line into implementation section (android/app/build.gradle)
dependencies {
implementation "com.google.firebase:firebase-iid"
}

Thanks @MDXDave for letting know this to everyone. I appreciate you're valuable time.::)

[owolp]

Thank you @MDXDave for the workaround.
I've also added an explanation to the implementation

implementation("com.google.firebase:firebase-iid") {
        because("https://github.com/mixpanel/mixpanel-android/issues/744")
}

[yangcheng]

when can we expect a proper fix by removing the deprecated dependency ?

[trickeyd]

yes agree with @yangcheng - would be good to remove this.

Thanks to @MDXDave and @owolp BTW - I was pretty stuck

[ubarua123]

when can we expect a proper fix by removing the deprecated dependency ?

This is actually important since apps will have conflicts with FirebaseMessaging and FirebaseInstanceId.

[zihejia]

Thanks for bringing it up. We will address this issue as a priority.

[Shinwari536]

I don't know how to thank you. You solve my issue which I have been facing for more than 2 weeks. I added the dependency and it worked. Thanks again.

[krutarth-h-dave]

You can fix this issue by adding the firebase-iid dependency:

implementation("com.google.firebase:firebase-iid")

Much thanks. Solved the issue which was keeping me to upgrade dependencies appwide. Much thanks.

[omarreess]

Added these in App's Build gradl dependencies 

implementation platform('com.google.firebase:firebase-bom:28.0.1')
implementation("com.google.firebase:firebase-iid")

[luansingjavier]

@omarreess Thanks for this. I already solved my issue.

[zihejia]

We have released v5.9.4 which has the fix for the missing dependency. We are deprecating Messaging and Mobile A/B testing features(more details) so the FCM service will be removed soon from our SDK. I'm closing this one now, please feel free to raise any questions.