title: Xcode 9 beta 2 storyboard is full of errors
body: <p>I recently upgraded to xcode 9 beta 2 and my storyboard is full of errors, it was completely fine on xcode 8. I attached a screenshot of it. Is there any fix for that</p>
  
  <p><img src="https://i.stack.imgur.com/meFRQ.png" alt="Storyboard errors"></p>
  
  <p><img src="https://i.stack.imgur.com/zXMPX.png" alt="Storyboard errors 2"></p>