title: RStudio shiny runApp fails in working directory
body: <p>I have a folder of R Projects called "R Projects".  R Projects is my default RStudio working directory.  I created the initial shiny tutorial app App-1 in a project folder called App-1 under R Projects.</p>
  
  <p>When I attempt to run App-1; runApp("App-1") from the App-1 project I get the error message:</p>
  
  <pre><code>Error in shinyAppDir(x) : No Shiny application exists at the path "App-1"
  </code></pre>
  
  <p>When I modify runApp: runApp("App-1", appDir = getwd()) it throws the error:</p>
  
  <pre><code>Listening on domain socket App-1
  Error in startPipeServer(port, mask, handlerManager$createHttpuvApp()) : 
    Failed to create server
  </code></pre>
  
  <p>However when I close the App-1 project and run App-1 from the default directory; Project (None), App-1 runs as intended as a shiny app.</p>
  
  <p>I'm sure this is probably a trivial problem.  Any assistance appreciated.</p>