添加AdMob时出现Android错误

我对AdMob的广告有意见。我什么事都照写的做

这是我的密码：

渐变：

    apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.2"
    defaultConfig {
        applicationId "com.chesshorse.chesshorse"
        minSdkVersion 15
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        jackOptions {
            enabled true
        }
    }
    buildTypes {
//        release {
//            minifyEnabled false
//            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
//        }
        debug {
            debuggable true
        }
    }
    compileOptions {
        targetCompatibility 1.8
        sourceCompatibility 1.8
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.1.1'
    compile 'com.android.support:support-v4:25.1.1'
    compile 'com.google.firebase:firebase-ads:10.2.0'
    testCompile 'junit:junit:4.12'

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

Graddle同步正确，但当我编译应用程序并在调试器中运行时，应用程序立即关闭，并出现以下错误：

E/AndroidRuntime: FATAL EXCEPTION: main
              Process: com.chesshorse.chesshorse, PID: 2260
              java.lang.NoSuchMethodError: No static method zzb(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object; in class Lcom/google/android/gms/common/internal/zzac; or its super classes (declaration of 'com.google.android.gms.common.internal.zzac' appears in /data/app/com.chesshorse.chesshorse-2/base.apk)
                  at com.google.firebase.provider.FirebaseInitProvider.zza(Unknown Source)
                  at com.google.firebase.provider.FirebaseInitProvider.attachInfo(Unknown Source)
                  at android.app.ActivityThread.installProvider(ActivityThread.java:5853)
                  at android.app.ActivityThread.installContentProviders(ActivityThread.java:5445)

---

有人遇到过这个错误吗？我看了其他问题，但没有一个有用。谁能告诉我哪里出错了吗？

也许你错过了什么。您用于测试的设备或模拟器是否安装了10.2.98版Google Play Services？@qbix您如何知道我使用的是哪个版本？如何检查这个？我尝试使用android 6.0和Nexus 6 aPI 25使用设置>应用程序管理器；滚动找到谷歌播放服务；单击它查看应用程序信息，包括版本号。

E/AndroidRuntime: FATAL EXCEPTION: main
              Process: com.chesshorse.chesshorse, PID: 2260
              java.lang.NoSuchMethodError: No static method zzb(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object; in class Lcom/google/android/gms/common/internal/zzac; or its super classes (declaration of 'com.google.android.gms.common.internal.zzac' appears in /data/app/com.chesshorse.chesshorse-2/base.apk)
                  at com.google.firebase.provider.FirebaseInitProvider.zza(Unknown Source)
                  at com.google.firebase.provider.FirebaseInitProvider.attachInfo(Unknown Source)
                  at android.app.ActivityThread.installProvider(ActivityThread.java:5853)
                  at android.app.ActivityThread.installContentProviders(ActivityThread.java:5445)