How to use nav link proxy to make the AI jump?

The nav proxy link only allows my AI to fall but not to jump back, doesn’t matter if it is set both ways, left to right or right to left. I know there is a solution with C++, but I don’t understand C++.

Here is a tutorial to make exactly that:
A new, community-hosted Unreal Engine Wiki - Announcements - Unreal Engine Forums1-_Making_AI_Jump_as_a_Part_of_Path_Following

Video for a blueprint implementation using nav links