title: code:3, Return on connection error CONNECTION_ERR in Transfer plugin
body: <p>I am trying to download an pdf file form transfer plugin </p>
  
  <pre><code>fileTransfer.download(url+'?token=XXXXXX121b42867f03b7f1701e8f8656566a5', this.file.dataDirectory + file.filename).then((entry) =&gt; {
          loader.dismiss();
  
          console.log('download complete: ' + entry.toURL());
  
        }, (error) =&gt; {
          // handle error
  
          console.log(error);
          console.log('ERROR');
  
  
        });
  </code></pre>
  
  <p>i am always invoking error part of my transfer plugin. </p>
  
  <p>I know it is something to do with my token i have tried my best but i wanted to know am i passing my token correctly an why i am always invoking error part.</p>