Strange error when adding items to prototype cells in storyboard-IB

Question

I have quite a large project (~20 scenes). One of which is a TableViewController with a custom UITableViewController class. I have given the cell a reuse identifier, and add

Answer 1

I faced the same problem but later it turned out that it was just a silly mistake. I mistakenly dragged the label from Cell to my controller's @interface

This could be your problem too. just cross check once.