如何修复“错误：找不到ID为'com.android.application'的插件”？

Question

我创建并删除了一些活动，并且发生了此错误。
错误显示：

  

“错误：找不到ID为'com.android.application'的插件。”

enter image description here

这是我的Build.Gradle代码：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.1"
    defaultConfig {
        applicationId "com.example.application12"
        minSdkVersion 15
        targetSdkVersion 29
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}


dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
    implementation 'com.google.android.material:material:1.0.0'
    implementation 'androidx.appcompat:appcompat:1.0.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.2.0'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
    implementation 'com.google.android.material:material:1.0.0'
    implementation 'com.squareup.retrofit2:retrofit:2.0.2'
    implementation 'com.squareup.retrofit2:converter-gson:2.0.2'
    implementation 'com.squareup.picasso:picasso:2.5.2'
    implementation 'de.hdodenhof:circleimageview:3.0.0'
    implementation 'com.mikhaellopez:circularimageview:3.2.0'
    implementation 'com.google.android.gms:play-services-base:11.0.1'
    implementation 'com.google.android.gms:play-services-basement:11.0.1'
    implementation 'com.google.android.gms:play-services-safetynet:11.0.1'
    implementation 'com.google.android.gms:play-services-tasks:11.0.1'
}