If your code is not working, you can check type of your “InputModeData” variable in “MainMenu.cpp” file. Because I copied this variable directly from “Setup” method and i couldn’t realized that the variable type is “FInputModeUIOnly” in “Setup” method. However, the type of variable in “TearDown” method should be " FInputModeGameOnly".
Moreover, if you want to clear error message about “Non-Focusable widget”, you should enable “Is Focusable” property inside WBP_MainMenu bluprint file as I showed belowed picture.
