错误：（52，0）未找到Gradle DSL方法：使用Quickblox API时出现“сompile（）”

我试图通过添加在线Maven依赖项在程序中使用Quickblox API。我正在使用Android Studio。
当我尝试构建程序时，它显示以下错误：

错误：（52，0）未找到Gradle DSL方法：`сompile（）`可能的原因：

项目“ Nanny Watch”可能正在使用不包含该方法的Gradle版本。
打开Gradle包装器文件

生成文件可能缺少Gradle插件。
应用Gradle插件

这是build.gradle（Project：NannyWatch2）文件：

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:1.5.0'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {

        jcenter()
    }
}

这是build.gradle（Module：App）文件：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"

    defaultConfig {
        applicationId "com.example.user.nannywatch"
        minSdkVersion 16
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
        multiDexEnabled true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    def qbSdkVersion = '2.5'

    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'org.apache.commons:commons-lang3:3.4'
    compile 'net.schmizz:sshj:0.10.0'
    compile 'com.android.support:appcompat-v7:23.1.1'
    compile 'com.android.support:design:23.1.1'
    compile 'com.android.support:multidex:1.0.0'
    compile('vc908.stickers:stickerfactory:0.2.2@aar') {
        transitive = true;
    }
    compile 'com.google.android.gms:play-services-gcm:7.5.0'  

// I tried using jar compile, but the method QBPushNotifications cannot be resolved
// Therefore I tried to use the online repository

//    compile files('src/main/java/com/example/user/nannywatch/jars/quickblox-android-sdk-chat-2.4.jar')
//    compile files('src/main/java/com/example/user/nannywatch/jars/quickblox-android-sdk-content-2.4.jar')
//    compile files('src/main/java/com/example/user/nannywatch/jars/quickblox-android-sdk-core-2.4.jar')
//    compile files('src/main/java/com/example/user/nannywatch/jars/quickblox-android-sdk-customobjects-2.4.jar')
//    compile files('src/main/java/com/example/user/nannywatch/jars/quickblox-android-sdk-location-2.4.jar')
//    compile files('src/main/java/com/example/user/nannywatch/jars/quickblox-android-sdk-messages-2.4.jar')
//    compile files('src/main/java/com/example/user/nannywatch/jars/quickblox-android-sdk-videochat-webrtc-2.4.jar')  

    сompile "com.quickblox:quickblox-android-sdk-core:$qbSdkVersion@aar"
    сompile ("com.quickblox:quickblox-android-sdk-chat:$qbSdkVersion@aar"){
        transitive=true
    }
    сompile "com.quickblox:quickblox-android-sdk-content:$qbSdkVersion@aar"
    сompile "com.quickblox:quickblox-android-sdk-messages:$qbSdkVersion@aar"
    сompile "com.quickblox:quickblox-android-sdk-customobjects:$qbSdkVersion@aar"
    сompile "com.quickblox:quickblox-android-sdk-location:$qbSdkVersion@aar"
    сompile "com.quickblox:quickblox-android-sdk-videochat-webrtc:$qbSdkVersion@aar"
}

还有一个警告：'dependencies'不能应用于'（groovy.lang.Closure）'图片