title: Xcode 9, iOS 10 issue with Assets
body: <p>I'm having a problem with assets and Xcode 9 beta running on devices with iOS 10. It doesn't upload any image from assets, so on the phone I can't see any asset! </p>
  
  <p>If I load images in the storyboard, it just doesn't show any image on the phone (but it shows in the storyboard), if I do something:</p>
  
  <p><code>UIImage(named:"imageName")!</code></p>
  
  <p>It crashes with log message:</p>
  
  <blockquote>
    <p>*** Assertion failure in -[_CUIThemePixelRendition _initWithCSIHeader:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/CoreUI/CoreUI-428.6/CoreTheme/ThemeStorage/CUIThemeRendition.m:3788
    Could not load the "imageName" image referenced from a nib in the bundle with identifier "myIdentifierName"</p>
  </blockquote>
  
  <p>This is strange as the same code running on another device with iOS 11 beta works and I can see the images.</p>