"Create Client" Button greyed out for setting up Client Billing

Hi there can someone let me know why my “Create Client” button is greyed out after I fill out all the info? it’s kind of driving me nuts, I really can’t figure out why? I have a pro plan BTW

Here is my site Read-Only: https://preview.webflow.com/preview/skys-the-limit?utm_medium=preview_link&utm_source=designer&utm_content=skys-the-limit&preview=f0acc02d15d70f6a659196724feaefc1&mode=preview