Android 从git推拉后出错

我有一个安卓工作室项目，它是wroks。我把它推到gitlab上，移除它后，我又拉了一次。 现在，当我想构建gradle时，会出现以下错误：

Error:The module 'app' is an Android project without build variants, and cannot be built.Please fix the module's configuration in the build.gradle file and sync the project again.

这是我的身材。格雷德尔：

 apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    buildToolsVersion "26.0.0"
    defaultConfig {
        applicationId "sample.spart.com"
        minSdkVersion 21
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation 'com.android.support:support-v4:26.1.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
    implementation 'com.android.support:cardview-v7:27.0.2'
    implementation 'com.android.support:design:27.0.2'
    implementation 'com.nineoldandroids:library:2.4.0'
    implementation 'com.android.support:recyclerview-v7:26.0.0-alpha1'
}

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问题是什么？我该如何解决？？？

也许你可以尝试使你的现金失效。 在Android Studio中： 文件->使缓存无效/重新启动

共享项目的build.gradle文件可能会有所帮助