title: UIStackView before iOS 9.0 in Xcode 7 beta 5
body: <p>I'm using Xcode 7 beta 5, and I'm getting an error that says "UIStackView before iOS 9.0". I see that at least one other person has had this problem, but their solution isn't working for me. My deployment target is 9.0.</p>
  
  <p>Here's a link to some helpful screenshots (since I guess I can't post pictures yet): <a href="https://docs.google.com/document/d/178kcpuzzeQM6lBAso4srStc0pnDL_2x1Z59_QevcKoc/edit?usp=sharing">https://docs.google.com/document/d/178kcpuzzeQM6lBAso4srStc0pnDL_2x1Z59_QevcKoc/edit?usp=sharing</a> </p>
  
  <p>Also, I've already erased and re-made the UI once, and didn't help. 
  Any insight is much appreciated!</p>