An event in a game is supposed to be fun and rewarding. I killed that guy more than 30 times for nothing, and it stopped being fun 28 runs ago. You're doing it wrong.
Problem is a bit different here, but I have the same error message. I can do something like speak to NPC > interract with object > go back to NPC. I don't get error for this. But, if I set the NPC to appear when the objective occurs, I got the error. I wanna do it like that because NPCs reactions are different before and…