I have started a new app a few days ago and began working with the simulator to test it. I started as an empty project and manually added the storyboard. The simulator build
This problem happened for me when i was calling storyboard in code.The reason was i used different 'word' for storyboard.I solved it like this
Go to Targets ->info , select info,copy name of storyboard and paste it to where you are calling storyboard.
At least give a try….