Hi ,
I’m not sure exactly what he means by that statement but the ‘add call to parent function’ only appears once the Tick function for a class has been changed in code. It allows you to get the default Tick without the modifications that were added. I have noticed an issue where the Tick node that is readily available in a new blueprint doesn’t give this option at all however and will be placing a bug report for it. As a workaround, you can delete the default Tick node that it given and place another one. If the Tick function has been edited in the code, it should give you the option.
I hope this helps you with this issue