title: Error when adding cordova plugin
body: <p>Hi i am updating my android program on cordova to newest version 6.1.1. </p>
  
  <p>But when adding new plugin it throws error. </p>
  
  <pre><code>Error: Registry returned 404 for GET on https://registry.npmjs.org/org.apache.cordova.splashscreen.
  </code></pre>
  
  <p>How to solve this problem?</p>