title: Xcode 7.2 can't attach to iPhone with iOS 9.2
body: <p>For development purposes, I already put iOS 9.2 beta on my iPhone 5s. Of course, I also installed Xcode 7.2 beta.</p>
  
  <p>When I want to run an app extension (keyboard) on the device, the app builds properly, gets installed on the iPhone and started. Then, however, I'm presented with this message in Xcode:</p>
  
  <blockquote>
    <p><strong>Could not launch "MyApp"</strong></p>
    
    <p>process launch failed: failed to get the task for process </p>
  </blockquote>
  
  <p>Does anyone know how to fix this?</p>
  
  <p><strong>EDIT</strong>: With the final release version if Xcode 7.2, the message changed to</p>
  
  <blockquote>
    <p><strong>Could not launch "MyApp"</strong></p>
    
    <p>unable to attach</p>
  </blockquote>