Auto register source is causing me problems!

So I’m trying to do a npc going to an object if it sees that object and i used this tutorial to do it Unreal Engine 4 Tutorial: Artificial Intelligence | Kodeco however i was having trouble getting the object being detected and found out that the auto register source did the trick. However, this caused me to have problems that took hours to fix, the problem was that anytime i dragged and drop that object into the game while playing it would crash. I’m trying to do it without it but it seems to not cast to the object, idk why, it worked before (like a couple of months ago) without the auto register. I do have alternatives but i wanted to do senses because i felt it made much more sense to do for what im doing. Has anyone had this problem before? If so do i just do with or without auto?