title: Error:(126, 13) Failed to resolve: com.opentok.android:opentok-android-sdk:2.9.+
body: <p>I am using opentok library that is</p>
  
  <pre><code>    compile 'com.opentok.android:opentok-android-sdk:2.9.+'
  </code></pre>
  
  <p>and in my build.gradle file i have added</p>
  
  <pre><code>     maven {
          url  "http://tokbox.bintray.com/maven"
      }
  </code></pre>
  
  <p>but unable to solve this error</p>
  
  <pre><code>    Error:(126, 13) Failed to resolve: com.opentok.android:opentok-android-sdk:2.9.+
      Show in File
      Show in Project Structure dialog
  </code></pre>
  
  <p>And when i am trying to clean the project then i am getting this </p>
  
  <pre><code>    Error:A problem occurred configuring project ':app'.
      &gt; Could not resolve all dependencies for configuration        ':app:_debugApkCopy'.
      &gt; Could not resolve com.opentok.android:opentok-android-sdk:2.9.+.
      Required by:
       project :app
    &gt; Could not resolve com.opentok.android:opentok-android-sdk:2.9.+.
       &gt; Failed to list versions for com.opentok.android:opentok-android-sdk.
          &gt; Unable to load Maven meta-data from http://dl.bintray.com/populov/maven/com/opentok/android/opentok-android-sdk/maven-metadata.xml.
             &gt; Could not GET 'http://dl.bintray.com/populov/maven/com/opentok/android/opentok-android-sdk/maven-metadata.xml'.
                &gt; Address family not supported by protocol family: connect
    &gt; Could not resolve com.opentok.android:opentok-android-sdk:2.9.+.
       &gt; Failed to list versions for com.opentok.android:opentok-android-sdk.
          &gt; Unable to load Maven meta-data from http://dl.bintray.com/lukaville/maven/com/opentok/android/opentok-android-sdk/maven-metadata.xml.
             &gt; Could not GET 'http://dl.bintray.com/lukaville/maven/com/opentok/android/opentok-android-sdk/maven-metadata.xml'.
                &gt; Address family not supported by protocol family: connect
    &gt; Could not resolve com.opentok.android:opentok-android-sdk:2.9.+.
       &gt; Failed to list versions for com.opentok.android:opentok-android-sdk.
          &gt; Unable to load Maven meta-data from http://tokbox.bintray.com/maven/com/opentok/android/opentok-android-sdk/maven-metadata.xml.
             &gt; Could not GET 'http://tokbox.bintray.com/maven/com/opentok/android/opentok-android-sdk/maven-metadata.xml'.
                &gt; Address family not supported by protocol family: connect
  </code></pre>
  
  <p>please help me to solve this, Thank you.</p>