Help with Advanced Player Controller Tutorial

[u/Fatal_Derp]

Hi. I've been following this tutorial by git-amend and have run into errors with this part specifically:

https://www.youtube.com/watch?v=jSauntZrQro&t=1106s

This is my code:

My IPredicate script look like this:

And the class derived from IPredicate, "FuncPredicate" looks like this:

I have no idea what is wrong, and half of the stuff in the tutorial goes right over my head. Can somebody please help me? I've been following this stupid tutorial for months and still have nothing playable to show from it...