title: Failed to display Jupyter Widget of typeHBox; widgets JavaScript library missing?
body: <p>I am trying to use <a href="https://github.com/bstriner/keras-tqdm" rel="noreferrer">keras-tqdm</a> to get a progress bar in my Jupyter notebook when training models with Keras, but I'm stuck on the following error message:</p>
  
  <blockquote>
    <p>Failed to display Jupyter Widget of type HBox.</p>
    
    <p>If you're reading this message in the Jupyter Notebook or JupyterLab
    Notebook, it may mean that the widgets JavaScript is still loading. If
    this message persists, it likely means that the widgets JavaScript
    library is either not installed or not enabled. See the <a href="https://ipywidgets.readthedocs.io/en/stable/user_install.html" rel="noreferrer">Jupyter
    Widgets Documentation</a> for setup instructions.</p>
    
    <p>If you're reading this message in another frontend (for example, a
    static rendering on GitHub or NBViewer), it may mean that your
    frontend doesn't currently support widgets.</p>
  </blockquote>
  
  <p>I have visited the <a href="https://ipywidgets.readthedocs.io/en/stable/user_install.html" rel="noreferrer">documentation page</a> that they link to and have executed their commands. Nothing seems to work, and I'm lost as to what the next step is.</p>
  
  <p>Earlier it just said that I had an old version of the JavaScript widgets, and that I needed a newer one. I followed various instructions in order to try to update the JavaScript widgets, and that's how this happened.</p>
  
  <p>To be clear, here is the command from the documentation:</p>
  
  <pre><code>conda install -c conda-forge ipywidgets
  </code></pre>
  
  <p>when I run it, I get the following:</p>
  
  <pre><code># All requested packages already installed.
  # packages in environment at C:\ProgramData\Anaconda2\envs\py36:
  #
  ipywidgets                7.1.1                    py36_0    conda-forge
  </code></pre>
  
  <p>where py36 is the environment that I'm using.</p>
  
  <p>What can I do next?</p>