“View Controller“ is unreachable because it has no entry points, and no identifier for runtime access via

: Unsupported Configuration: “View Controller“ is unreachable because it has no entry points, and no identifier for runtime access via -[UIStoryboard instantiateViewControllerWithIdentifier:].

=> 

3번에 is initial View Controller 체크박스에 체크해주면 된다.

출처 : stackoverflow