Help with clicking missile system

Hello! I have tried to copy and paste an old game of mine that is when you click on a TextButton it makes a part and then when you click on the part it places and when you click on the part again it shoots a missile from the air. So in the game where I originally had it, it works perfectly. But if I transport it to another game an error occurs with something in ReplicatedStorage which is why I have it open so you can see the things in there if that is what is causing the issue and it won’t let me even make the part. Here are 2 examples, first one is how it usually works and second one is how it works in the game that I imported it into.
https://gyazo.com/7e1b65cafac26cac14e968bf048106ba
https://gyazo.com/337d55c33beb474c021b4a01a23f79ca
If anyone wants to help, that would be very appreciated. Thank you!

Can you send the code? The error your getting means that your script does not know what part your trying to clone.