bugreport number 28276210
Xcode 8.0 GM (8A218a) when compile storyboard write: Internal error.Please file a bug at bugreport.apple.com and attach
bug happened when compile tvOS storyboard.
Xcode 7 and Xcode 8 beta 5 compile this file without a error.
Same storyboard made for iOS compile with Xcode 8 GM without error.
But Xcode 8 beta 1 write the same Internal error
Yep, sometimes I'm getting this error too.
Hope Apple fixe Interface Builder bug today.
Release Xcode 8 (8A218a) from AppStore compile storyboard with same error.