Help making a button that spawns humans?

I have no experience in scripting although I took components and tools from a known game called Ro-Bio. The issue I'm having is that the button isn't spawning any humans. I believe I might be missing a model but I'm unsure. If someone's interested to help I'd like to further discuss it on discord. I believe its a small and simple issue so hmu if you'd like shellshocked#5513