Yeah, so unfortunately that ending to the scene just straight up does not exist, so there's no fix for it. I'm so sorry, I meant to remove it since I never actually got around to adding it(I never even got so far as to *starting* the artwork/CGs for it). I'll try to remember to remove the option whenever I get around to the next update so that people don't run into the issue anymore, but for now just ignore the option there :(