title: Ray Dashboard error in the browser "ERR_CONNECTION_REFUSED"
body: <p>When starting ray 1.2.0 in a jupyter notebook:</p>
  <pre><code>import ray
  ray.init(num_cpus = 8)
  </code></pre>
  <p>The log says that the dashboard is available on:</p>
  <pre><code>2021-02-25 16:21:23,636 INFO services.py:1174 -- View the Ray dashboard at http://127.0.0.1:8265
  </code></pre>
  <p>But I get &quot;ERR_CONNECTION_REFUSED&quot; in the browser.</p>