Error:Cause: unable to find valid certification path to requested target

Question

I got the following Error in android Studio 2.2.3 when I sync gradle.

Error:Cause: unable to find valid certification path to requested target

How can I fix this issue

I am Adding my Gradle file also

apply plugin: 'com.android.application' android { compileSdkVersion 25 buildToolsVersion "25.0.2" defaultConfig {     applicationId "com.sample.myapplication"     minSdkVersion 16     targetSdkVersion 22     versionCode 1     versionName "1.0"     testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes {     release {         minifyEnabled false         proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'     } } } dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {     exclude group: 'com.android.support', module: 'support-annotations' }) compile 'com.android.support:appcompat-v7:23.4.0' compile 'com.android.support:design:23.4.0' compile 'com.android.support:palette-v7:23.4.0' testCompile 'junit:junit:4.12' // FireBase compile 'com.google.firebase:firebase-messaging:9.0.0' }//Add this line apply plugin: 'com.google.gms.google-services' 

and the project Level Gradle File

buildscript { repositories {     jcenter() } dependencies {     classpath 'com.android.tools.build:gradle:2.2.3'     classpath 'com.google.gms:google-services:3.0.0' } } allprojects { repositories {     mavenCentral()     jcenter{ url "http://jcenter.bintray.com/" }     maven { url "https://jitpack.io" } } } task clean(type: Delete) { delete rootProject.buildDir } 

Answer 1

This problem might be due to some restricted internet connections... If you are installing build tools on some restricted network, the required certificates might not install... So try changing the network connection.... Worked for me.....

Answer 2

I faced the same issue, but fixed it by adding

maven { url "http://jcenter.bintray.com"} 

in the project Level Gradle File

buildscript { repositories {     jcenter()     maven { url "http://jcenter.bintray.com"} } dependencies {     classpath 'com.android.tools.build:gradle:2.2.3'     classpath 'com.google.gms:google-services:3.0.0' } } allprojects { repositories {     mavenCentral()     jcenter{ url "http://jcenter.bintray.com/" }     maven { url "https://jitpack.io" } } } task clean(type: Delete) { delete rootProject.buildDir }