Xcode 6 GM crashes when selecting the main storyboard or a xib

Question

I just downloaded the Xcode 6 GM and every time I select the main storyboard (and a specific xib) Xcode crashes.

The error to be sent to Apple contains the following

Answer 1

What worked for me, and still using AutoLayout

1. Open the storyboard as source code
2. Editing useAutolayout="YES" to useAutolayout="NO"
3. Closing the source code
4. Open the storyboard as Interface Builder - Storyboard
5. And this is the most important step: In the File Inspector View (left pane) checking "Use AutoLayout"

Done.