Class file for com.google.android.gms.internal.zzaja not found

Question

I am using Fragment for the designing of the Firebase simple login registration.

I get error in the OnCreateView() method on initializing

Answer 1

play services, firebase, gradle plugin latest version combination that worked for me.
try app module build.gradle

android {
        compileSdkVersion 27
        buildToolsVersion '27.0.3'
        defaultConfig {
            applicationId "my package name"
            minSdkVersion 16
            targetSdkVersion 27
            versionCode 1
            versionName "1.0"
            multiDexEnabled true
            publishNonDefault true
            testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        } }

    dependencies {
        implementation 'com.google.android.gms:play-services-location:15.0.1'
        implementation 'com.google.android.gms:play-services-maps:15.0.1'
        implementation 'com.google.android.gms:play-services-vision:15.0.2'
        implementation 'com.google.android.gms:play-services-analytics:16.0.1'
        implementation 'com.google.firebase:firebase-core:16.0.1'
        implementation 'com.google.firebase:firebase-iid:17.0.0'
        implementation 'com.google.firebase:firebase-messaging:17.3.0'
        implementation 'com.google.firebase:firebase-crash:16.0.1'
    }

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

And project level build.gradle like this

buildscript {
    repositories {

        maven { url 'https://maven.google.com' }
        google()
        jcenter()

    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.4'
        classpath 'com.google.gms:google-services:4.1.0'
    }
}