Welcome to the Community!
A couple of things to look for when editing your website. Do you want to retain the email address of your visitors outside of the form? Make sure the "Show Email Opt-In" is toggled ON. Is it possible your grayed-out area is the box used to enter the message that asks the visitor to sign up? Are any of the required fields, such as email address, empty?
If you continue to have issues, please contact our support team for assistance at one of the numbers in the link below.
Supporting you at x.co/247support