Unknown 'libraryvariants' Property - Gradle Will Not Sync

Long story shortened: I am changing an android app from using Azure mobile app services to use Google Firebase. Firebase was really easy and straight forward to get setup for Javas

Solution 1:

I had the same problem with my library module and solved it updating gradle and google-services versions.

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.0'
        classpath 'com.google.gms:google-services:3.1.1'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}