This worked for me too. For those like me that benefit from detailed steps:
Open StoryBoard
Make sure there is a Navigation Controller embedded/linked to first/initial ViewController
Click on Initial/Main/First View Controller. Open the Identity Inspector in high hand pane/column - in second block labelled View Controller make sure the Title is correct and check the box - Is Initial View Controller.
Run your project and the error is gone.
Thank you AAABC.
ProgrammerCT
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