创建Firebase身份验证时出现运行时错误

Question

这是我的build.gradle文件

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.abhin.myapplication"
        minSdkVersion 16
        targetSdkVersion 28
        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'])
    //noinspection GradleCompatible
    implementation 'com.android.support:appcompat-v7:28.0.0-beta01'
    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
    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'
    implementation 'com.google.firebase:firebase-firestore:17.0.4'
    implementation 'com.google.firebase:firebase-database:16.0.1'
    implementation 'com.google.firebase:firebase-core:16.0.1'
    implementation 'com.google.firebase:firebase-storage:16.0.1'
    implementation 'com.firebaseui:firebase-ui-auth:0.6.0'
    implementation 'com.google.firebase:firebase-auth:16.0.2'
}
apply plugin: 'com.google.gms.google-services'

  

运行时错误：程序类型已存在：android.support.design.widget.CoordinatorLayout $ Behavior   消息{种类=错误，文本=程序类型已存在：   android.support.design.widget.CoordinatorLayout $ Behavior，   sources = [未知源文件]，工具名称= Optional.of（D8）}

请指导我要去哪里了？无法创建身份验证UI。