After I update Android Studio to 3.2.1 and gradle version in my project I am getting following build error.

I have already checked lots of questions related this question but no luck.

Project dependency Build.gradle

buildscript {

    repositories {
        google()
        mavenCentral()
        maven { url 'https://maven.google.com' }
        gradlePluginPortal()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'

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

allprojects {
    repositories {
        google()
        maven { url "https://jitpack.io" }
        jcenter ()

    }
}

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

Error

org.gradle.api.ProjectConfigurationException: A problem occurred configuring root project 'DemoAppppp'.
    at org.gradle.configuration.project.LifecycleProjectEvaluator.addConfigurationFailure(LifecycleProjectEvaluator.java:94)

Caused by: org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration$ArtifactResolveException: Could not resolve all artifacts for configuration ':classpath'.
    at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.rethrowFailure(DefaultConfiguration.java:944)

Caused by: org.gradle.internal.resolve.ModuleVersionResolveException: Could not resolve com.android.tools.build:gradle:3.2.1.
Required by:
    project :
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainComponentMetaDataResolver.resolveModule(RepositoryChainComponentMetaDataResolver.java:103)
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainComponentMetaDataResolver.resolve(RepositoryChainComponentMetaDataResolver.java:63)

Caused by: org.gradle.internal.resolve.ModuleVersionResolveException: Could not resolve com.android.tools.build:gradle:3.2.1.
    at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ErrorHandlingModuleComponentRepository$ErrorHandlingModuleComponentRepositoryAccess.resolveComponentMetaData(ErrorHandlingModuleComponentRepository.java:139)

Caused by: org.gradle.api.resources.ResourceException: Could not get resource 'https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom'.
    at org.gradle.internal.resource.ResourceExceptions.failure(ResourceExceptions.java:74)
    at org.gradle.internal.resource.ResourceExceptions.getFailed(ResourceExceptions.java:57)

Caused by: org.gradle.internal.resource.transport.http.HttpRequestException: Could not GET 'https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom'.
    at org.gradle.internal.resource.transport.http.HttpClientHelper.performRequest(HttpClientHelper.java:96)

Caused by: org.apache.http.conn.HttpHostConnectException: Connect to localhost:80 [localhost/127.0.0.1, localhost/0:0:0:0:0:0:0:1] failed: Connection refused: connect 
Caused by: java.net.ConnectException: Connection refused: connect 

This problem appeared on OS X. After disabling web filtering application (some Google IPs were blocked) it disappeared. After syncing with gradle all files have been downloaded.

Also you may set a checkbox like in https://discuss.gradle.org/t/android-studio-could-not-get-resource-https-dl-google-com-dl-android-maven2-com-android-tools-build-gradle-3-1-0-gradle-3-1-0-pom/26734:

Settings -> Build … -> Gradle -> Android Studio -> Enable embedded maven repository.

See also Could not resolve com.android.tools.build.gradle:3.0.1.