尝试生成签名Apk时出现Gradle构建错误

大约34小时前我生成了一个签名的apk但现在，我一直无法生成签名的Apk，我不知道如何解决这个问题 . 请帮忙

这是我的输出消息

错误：注意：有11个重复的类定义 . （http://proguard.sourceforge.net/manual/troubleshooting.html#duplicateclass）FAILURE：构建因异常而失败 . 出了什么问题：任务执行失败'：app：lintVitalRelease' . 无法解析配置'：app：lintClassPath'的所有文件 . 无法解析com.android.tools.lint：lint-gradle：26.1.0 . 要求：project：app无法解析com.android.tools.lint：lint-gradle：26.1.0 . 无法获得资源'https://jcenter.bintray.com/com/android/tools/lint/lint-gradle/26.1.0/lint-gradle-26.1.0.pom' . 无法获取'https://jcenter.bintray.com/com/android/tools/lint/lint-gradle/26.1.0/lint-gradle-26.1.0.pom' . jcenter.bintray.com：提供的nodename或servname，或者未知无法解析com.android.tools.lint：lint-gradle：26.1.0 . 无法获取资源“https://dl.google.com/dl/android/maven2/com/android/tools/lint/lint-gradle/26.1.0/lint-gradle-26.1.0.pom” . 无法获取“https://dl.google.com/dl/android/maven2/com/android/tools/lint/lint-gradle/26.1.0/lint-gradle-26.1.0.pom” . dl.google.com：提供了nodename或servname，或者未知尝试：使用--stacktrace选项运行以获取堆栈跟踪 . 使用--info或--debug选项运行以获取更多日志输出 . 使用--scan运行以获得完整的见解 . 在https://help.gradle.org获取更多帮助 . 在10秒内构建失败

这是我的build.gradle（app）

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'io.fabric'

android {
    compileSdkVersion 26
    buildToolsVersion '27.0.3'
    defaultConfig {
        applicationId "com.myapp……"
        minSdkVersion 17
        targetSdkVersion 26
        versionCode 5
        versionName "5.0"
    }
    buildTypes {
        release {
            minifyEnabled true
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    packagingOptions {
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/LICENSE'
    }
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation "com.android.support:appcompat-v7:$support_version"
    implementation "com.android.support:design:$support_version"
    implementation "com.android.support:support-v4:$support_version"
    implementation "com.android.support:cardview-v7:$support_version"
    implementation "com.android.support:recyclerview-v7:$support_version"
    implementation "com.google.firebase:firebase-core:$firebase_version"
    implementation "com.google.firebase:firebase-messaging:$firebase_version"
    implementation "com.google.firebase:firebase-ads:$firebase_version"
    implementation 'com.crashlytics.sdk.android:crashlytics:2.9.1'
    implementation "com.google.firebase:firebase-perf:$firebase_version"
    implementation 'io.github.yavski:fab-speed-dial:1.0.6'
    implementation 'com.google.code.gson:gson:2.8.0'
    implementation 'com.codemybrainsout.rating:ratingdialog:1.0.8'
    implementation 'com.android.billingclient:billing:1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation 'org.jsoup:jsoup:1.10.3'
    testImplementation 'junit:junit:4.12'
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
}
apply plugin: 'com.google.gms.google-services'

apply plugin: 'kotlin-android-extensions'

这是我的build.gradle（项目）

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

buildscript {
    ext.kotlin_version = '1.2.10'
    ext.support_version = '26.1.0'
    ext.firebase_version = '12.0.1'
    repositories {
        jcenter()
        google()
        maven {
            url 'https://maven.fabric.io/public'
        }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.0'
        classpath 'io.fabric.tools:gradle:1.25.1'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
        classpath 'com.google.gms:google-services:3.1.2'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        jcenter()
        google()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}