Form button - not working :(

Hey guys,

My submit button stopped working, I can’t remember what I’ve changed. Here is the read-only link; hope you can help me out!

https://preview.webflow.com/preview/yellowcubes?utm_medium=preview_link&utm_source=dashboard&utm_content=yellowcubes&preview=81ec4ae2c68ed469709e93107c5dec2e&mode=preview