I am developing a TvOS application and have a problem with the interface designer when I drag objects such as Buttons , labels , segments, etc. .... the current view does not show me anything !!! only an empty rectangle that shows the position and area of ββthis object

When I launched the application, the objects will be shown in order!

What is wrong with the interface designer?
Xcode Version 7.1 (7B91b), OS X Version: 10.11.1 (15B42)
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"An internal error has occurred. Editing options may be limited."
xcode tvos storyboard tv
Mc.lover
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