StoryBoard failed - from xcode 8.3.3 to xcode9 beta2

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After move my project from 8.3.3 to 9.0 beta2, the storyboard counld not work, it just show the outline of the orignal, and i cant complie it, shows the error below.
Anyone knows why?

Storyborad only show the outline

Error info

1 Answers
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