title: Android: Failed to resolve: com.android.support:appcompat-v7:28.1.1
body: <p>Error : Sync failed. Unresolved Android dependencies. Failed to resolve:  com.android.support:appcompat-v7:28.1.1</p>
  
  <p>Config:</p>
  
  <pre><code> apply plugin: 'com.android.application'
  
      android {
          compileSdkVersion 28
          defaultConfig {
              applicationId "com.ercess.ercess_app1"
              minSdkVersion 15
              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'])
          implementation 'com.android.support.constraint:constraint-layout:1.1.2'
          implementation 'com.android.support:appcompat-v7:28.1.1'
          implementation 'com.squareup.picasso:picasso:2.71828'
          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'
  
      }
  </code></pre>
  
  <p>How to resolve this?</p>