code related questions like this are probably best for the unreal forums if you didnt ask there already if you had it working before, rather than guess at things its usually easiest to revert back to when it was working you can just make a feature branch from that point can duplicate the project so that you can step…
its quite hard to follow what's going on in the video to be honest i dont think you have much choice but to chuck some breakpoints in the BPs and identify which test is failing - it's probably a lot easier when there aren't 50 NPCs trying to do it all at once