Cannot read properties of undefined (reading "code")

i kinda suck at coding but im working on it, but ive never seen this error message before and normally OhNoes would help but even he doesnt know whats going on, i looked through my code multiple times and i have no idea whats going on. Can anyone help me? heres the project link https://www.khanacademy.org/computer-programming/new-program/5854291087114240