title: Error when opening a terminal in Microsoft Azure Machine Learning
body: <p>After creating a compute instance under Microsoft Azure Machine Learning and select Jupyter to open Jupyter Notebook, I am selecting a New terminal from the menu. However, I am getting the following errors:</p>
  <pre><code>terminado.js:4 WebSocket connection to 'wss://xalapa.eastus2.instances.azureml.ms/terminals/websocket/2' failed: Error during WebSocket handshake: Unexpected response code: 426
  make_terminal @ terminado.js:4
  index.js:5 Uncaught TypeError: Cannot read property 'parentElement' of undefined
      at proposeGeometry (index.js:5)
      at fit (index.js:30)
      at Terminal.terminalConstructor.fit (index.js:44)
      at window.onresize (main.js:54)
  </code></pre>
  <p><a href="https://i.stack.imgur.com/868vU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/868vU.png" alt="enter image description here" /></a></p>
  <p><a href="https://i.stack.imgur.com/OfEQB.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/OfEQB.png" alt="enter image description here" /></a></p>
  <p>I have recreated the compute instance with no luck.</p>
  <p>Do you know what is the issue related?</p>
  <p>Thanks</p>