title: R Shiny: Unable to dispatch task for application, there are 1 tasks in progress
body: <p>When attempting to deploy my Shiny application, I received the following error message:</p>
  
  <pre><code>Error: HTTP 409
  POST https://api.shinyapps.io/v1/applications/194614/deploy
  Unable to dispatch task for application=194614, there are 1 tasks in progress
  Execution halted
  </code></pre>
  
  <p>Why is this happening? Is there anything I can do to stop the tasks that are in progress?</p>