Firebase 说我在 Manifest 中缺少一行，但它在那里

这是我的manifest：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.payne.simpletestapp">

    <uses-permission android:name="android.permission.VIBRATE" />
    <!-- GPS + OSMDroid -->
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <!-- To auto-complete the email text field in the login form with the user's emails -->
    <uses-permission android:name="android.permission.GET_ACCOUNTS" />
    <uses-permission android:name="android.permission.READ_PROFILE" />
    <uses-permission android:name="android.permission.READ_CONTACTS" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".MainActivities.Home"
            android:label="@string/app_name"
            android:theme="@style/AppTheme.NoActionBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <!--
                TODO : add an ACTION-VIEW INTENT FILTER (to allow for Google to search for app)
                https://stackoverflow.com/questions/34367875/android-adding-at-least-one-activity-with-an-action-view-intent-filter-after-u
                -->
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".MainActivities.MainActivity"
            android:theme="@style/AppTheme.NoActionBar" />
        <activity
            android:name=".DeviceStorage.SettingsActivity"
            android:label="@string/title_activity_settings" />
        <activity android:name=".Authentification.AuthUIActivity" />

        <meta-data android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />

        <!-- TODO: Firebase Cloud Messaging -->
        <!-- [START fcm_default_icon] -->
        <!--
             Set custom default icon. This is used when no icon is set for incoming notification messages.
             See README(...) for more.
        -->
        <meta-data
            android:name="com.google.firebase.messaging.default_notification_icon"
            android:resource="@drawable/logo_couleur_icon" />
        <!--
             Set color used with incoming notification messages. This is used when no color is set
             for the incoming notification message. See README(...) for more.
        -->
        <meta-data
            android:name="com.google.firebase.messaging.default_notification_color"
            android:resource="@color/colorAccent" />
        <!-- [END fcm_default_icon] -->
        <!-- [START fcm_default_channel] -->
        <!-- TODO: For default_notif_chans, see: https://medium.com/exploring-android/exploring-android-o-notification-channels-94cd274f604c -->
        <meta-data
            android:name="com.google.firebase.messaging.default_notification_channel_id"
            android:value="@string/default_notification_channel_id" /> <!-- TODO: Add default notif channel id -->
        <!-- [END fcm_default_channel] -->
        <service
            android:name=".Notifications.Firebase.MyFirebaseMessagingService"
            android:enabled="true"
            android:exported="true"> <!-- TODO: make sure "enabled" and "exported" are necessary -->
            <intent-filter>
                <action android:name="com.google.firebase.MESSAGING_EVENT" />
            </intent-filter>
        </service>
        <service
            android:name=".Notifications.Firebase.MyJobService"
            android:exported="false">
            <intent-filter>
                <action android:name="com.firebase.jobdispatcher.ACTION_EXECUTE" />
            </intent-filter>
        </service>

        <activity android:name=".Notifications.Firebase.NotifTestActivity"></activity>
    </application>

</manifest>

我得到的错误如下：

java.lang.IllegalStateException: A required meta-data tag in your app's AndroidManifest.xml does not exist.  You must have the following declaration within the <application> element:     <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" />

如您所见，我的 Manifest 实际上确实包含这段代码。

这里有什么问题？

这是我的build.gradle：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "com.example.payne.simpletestapp"
        minSdkVersion 16
        targetSdkVersion 27
        multiDexEnabled true
        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'
        }
    }
    packagingOptions {
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/license.txt'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/notice.txt'
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
    implementation 'com.android.support:design:27.1.1'
    implementation 'com.android.support:support-v4:27.1.1'
    implementation 'com.android.support:support-vector-drawable:27.1.1'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

    // TODO: revert 'api' to 'implementation' (checks relative dependencies)

    // Firebase Authentication
    api 'com.google.firebase:firebase-auth:16.0.2'
    api 'com.firebaseui:firebase-ui-auth:4.1.0'
    api 'com.google.firebase:firebase-core:16.0.1'
    api 'com.google.android.gms:play-services-auth:15.0.1'

    // Firebase Cloud Messaging (Notifications)
    api 'com.google.firebase:firebase-messaging:17.1.0'
    api 'com.firebase:firebase-jobdispatcher:0.8.5'

    // OSMDroid (Map)
    api 'org.osmdroid:osmdroid-android:6.0.1'
    api 'org.osmdroid:osmdroid-wms:6.0.1'
    api 'org.osmdroid:osmdroid-mapsforge:6.0.1'
    api 'org.osmdroid:osmdroid-geopackage:6.0.1'
    api 'com.github.MKergall:osmbonuspack:6.5.1' // Historical Pin Clusters

    // Spring Android
    api 'org.springframework.android:spring-android-rest-template:2.0.0.M3'
    api 'org.apache.httpcomponents:httpclient-android:4.3.5'
    // JSON @ https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind
    api 'com.fasterxml.jackson.core:jackson-databind:2.9.6'

    // Animations et Images
    api 'com.squareup.picasso:picasso:2.71828'
    api 'com.github.faruktoptas:FancyShowCaseView:1.0.1'
    api 'com.daimajia.easing:library:2.0@aar'
    api 'com.daimajia.androidanimations:library:2.3@aar'

    // @Getters/@Setters
    compileOnly 'org.projectlombok:lombok:1.18.0'
    annotationProcessor 'org.projectlombok:lombok:1.18.0'
}

repositories {
    maven {
        url 'https://repo.spring.io/libs-milestone'
    }
}

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

以防万一，这是我的内容@integer/google_play_services_version：

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <integer name="google_play_services_version">0</integer>
</resources>

是的，我的班级以前曾经工作过。我做了一些重构，但没有改变我的类背后的逻辑，也没有调用任何新的东西。