title: Dash suppress_callback_exceptions not working
body: <p>Here is how I implement it in my code. I have tried each way individually and using all of them as uncommented lines of code. No matter the combination of methods I use, I still have to manually turn suppress errors once my dashboard loads.</p>
  
  <pre><code>app = dash.Dash(__name__, external_stylesheets=external_stylesheets)
  app.title = 'TEST'
  
  app.config['suppress_callback_exceptions'] = True
  app.config.suppress_callback_exceptions = True
  </code></pre>
  
  <p>I have also tried (without any luck):</p>
  
  <pre><code>app = dash.Dash(__name__, external_stylesheets=external_stylesheets,
                  suppress_callback_exceptions = True)
  </code></pre>
  
  <p>and</p>
  
  <pre><code>import sys
  class HaltCallback(Exception):
      pass
  
  @app.server.errorhandler(HaltCallback)
  def handle_error(error):
      print(error, file=sys.stderr)
      return ('', 204)
  </code></pre>
  
  <p>Are there any other possible ways I can try to suppress the callback exceptions? I'm making a dashboard for my boss, so I'd really like automate the error suppression upon loading it.</p>