mavenCentral() doesn't work when I upgrade Android Studio to Arctic Fox 2020.3.1

Question

I have an android project, it worked well before.

Today I upgrade Android Studio to Arctic Fox 2020.3.1, then I run the project in Android Studio Arctic Fox 2020.3.1, but I get the following error.

I debug the project, I think the code mavenCentral() cause the error, so I replace mavenCentral() with jcenter(), the app can work well.

I know that jcenter() is obsoleted, but why does mavenCentral() cause error?

Error

**Execution failed for task ':app:kaptGenerateStubsFreeDebugMiniKotlin'.
> Could not resolve all files for configuration ':app:kapt'.
   > Failed to transform kotlinx-metadata-jvm-0.2.0.jar (org.jetbrains.kotlinx:kotlinx-metadata-jvm:0.2.0) to match attributes {artifactType=processed-jar, org.gradle.category=library, org.gradle.libraryelements=jar, org.gradle.status=release, org.gradle.usage=java-runtime}.
      > Could not download kotlinx-metadata-jvm-0.2.0.jar (org.jetbrains.kotlinx:kotlinx-metadata-jvm:0.2.0)
         > Could not get resource 'https://repo.maven.apache.org/maven2/org/jetbrains/kotlinx/kotlinx-metadata-jvm/0.2.0/kotlinx-metadata-jvm-0.2.0.jar'.
            > Could not GET 'https://repo.maven.apache.org/maven2/org/jetbrains/kotlinx/kotlinx-metadata-jvm/0.2.0/kotlinx-metadata-jvm-0.2.0.jar'.
               > Connect to repo.maven.apache.org:443 [repo.maven.apache.org/127.0.0.1] failed: Connection refused: connect
   > Failed to transform annotations-12.0.jar (com.intellij:annotations:12.0) to match attributes {artifactType=processed-jar, org.gradle.category=library, org.gradle.libraryelements=jar, org.gradle.status=release, org.gradle.usage=java-runtime}.
      > Could not download annotations-12.0.jar (com.intellij:annotations:12.0)
         > Could not get resource 'https://repo.maven.apache.org/maven2/com/intellij/annotations/12.0/annotations-12.0.jar'.
            > Could not GET 'https://repo.maven.apache.org/maven2/com/intellij/annotations/12.0/annotations-12.0.jar'.
               > Connect to repo.maven.apache.org:443 [repo.maven.apache.org/127.0.0.1] failed: Connection refused: connect
   > Failed to transform guava-29.0-jre.jar (com.google.guava:guava:29.0-jre) to match attributes {artifactType=processed-jar, org.gradle.category=library, org.gradle.libraryelements=jar, org.gradle.status=release, org.gradle.usage=java-runtime}.
      > Could not download guava-29.0-jre.jar (com.google.guava:guava:29.0-jre)
         > Could not get resource 'https://repo.maven.apache.org/maven2/com/google/guava/guava/29.0-jre/guava-29.0-jre.jar'.
            > Could not GET 'https://repo.maven.apache.org/maven2/com/google/guava/guava/29.0-jre/guava-29.0-jre.jar'.
               > Connect to repo.maven.apache.org:443 [repo.maven.apache.org/127.0.0.1] failed: Connection refused: connect
   > Failed to transform checker-qual-2.11.1.jar (org.checkerframework:checker-qual:2.11.1) to match attributes {artifactType=processed-jar, org.gradle.category=library, org.gradle.libraryelements=jar, org.gradle.status=release, org.gradle.usage=java-runtime}.
      > Could not download checker-qual-2.11.1.jar (org.checkerframework:checker-qual:2.11.1)
         > Could not get resource 'https://repo.maven.apache.org/maven2/org/checkerframework/checker-qual/2.11.1/checker-qual-2.11.1.jar'.
            > Could not GET 'https://repo.maven.apache.org/maven2/org/checkerframework/checker-qual/2.11.1/checker-qual-2.11.1.jar'.
               > Connect to repo.maven.apache.org:443 [repo.maven.apache.org/127.0.0.1] failed: Connection refused: connect
   > Failed to transform error_prone_annotations-2.3.4.jar (com.google.errorprone:error_prone_annotations:2.3.4) to match attributes {artifactType=processed-jar, org.gradle.category=library, org.gradle.libraryelements=jar, org.gradle.status=release, org.gradle.usage=java-runtime}.
      > Could not download error_prone_annotations-2.3.4.jar (com.google.errorprone:error_prone_annotations:2.3.4)
         > Could not get resource 'https://repo.maven.apache.org/maven2/com/google/errorprone/error_prone_annotations/2.3.4/error_prone_annotations-2.3.4.jar'.
            > Could not GET 'https://repo.maven.apache.org/maven2/com/google/errorprone/error_prone_annotations/2.3.4/error_prone_annotations-2.3.4.jar'.
               > Connect to repo.maven.apache.org:443 [repo.maven.apache.org/127.0.0.1] failed: Connection refused: connect**

*** Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.**

build.gradle

buildscript {
    ext.kotlin_version = "1.5.0"
    repositories {
        google()
        jcenter()
        //mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:4.2.2'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

        classpath "androidx.navigation:navigation-safe-args-gradle-plugin:2.3.5"

    }
}


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


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

Answer 1

Have you checked your hosts file for references to repo.maven.apache.org?

Reason:

[repo.maven.apache.org/127.0.0.1] failed: Connection refused: connect