Xcode storyboard: Internal error. Please file a bug

Question

While editing in the storyboard, specifically assigning a view controller to a specific class, I suddenly encountered this error when I wanted to run the project.

Ma

Answer 1

Try Deleting each view controller and Build to find the view controller causing an issue.

In my case, I misplaced object in the storyboard.

Deleting this object worked for me.