title: Xcode 9 error: "iPhone has denied the launch request"
body: <p>Using Xcode beta 9 (v4), I'm trying to launch the app by clicking on the "play" button. I get a "build succeeded" but right before launching, a popup message appears in Xcode:</p>
  
  <blockquote>
    <p>"iPhone has denied the launch request."</p>
  </blockquote>
  
  <p><a href="https://i.stack.imgur.com/069JN.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/069JN.jpg" alt="Launch request denial error popup"></a></p>
  
  <p>It used to work yesterday. It does work on the simulator. I've rebooted my computer, the iPhone, uninstall the app, cleaned the build. Running out of ideas.</p>