I have already installed Android SDK Platform 26, Android SDK Tools 26.0.2

[![enter image description here](https://i.stack.imgur.com/djvMp.jpg)](https://i.stack.imgur.com/djvMp.jpg)

This is my app level `build.gradle` file.

**build.gradle:**

```
apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    buildToolsVersion '26.0.0'
    defaultConfig {
        ...
        minSdkVersion 15
        targetSdkVersion 26
        ...
    }
    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-v7:26.0.2'
    compile 'com.android.support:support-v4:26.0.2'
    testCompile 'junit:junit:4.12'
}

```

I can't sync the gradle. I am getting these errors:

```
Error:(26, 13) Failed to resolve: com.android.support:appcompat-v7:26.0.2
Error:(27, 13) Failed to resolve: com.android.support:support-v4:26.0.2

```

Are the `appcompat` and `support` library versions are wrong?

How can I solve this issue? Please help.

Thanks in advance.