title: ValueError: not enough values to unpack (expected 3, got 0) when starting celery worker
body: <p>I used the following command to start a celery worker on Windows:</p>
  
  <pre><code>celery -A celery_worker.celery worker -l info
  </code></pre>
  
  <p>I got the following error:</p>
  
  <pre><code>ValueError: not enough values to unpack (expected 3, got 0)
  </code></pre>