There is custom code in the screencast I just linked to, above. The screencast walks you through implementing it. The webhook response triggers those default success / error messages.
// replace with your form ID
const form = document.getElementById('profile-form');
// set the Webflow Error Message Div Block ID to 'error-message'
let failureMessage = document.getElementById('error-message');
// set the Webflow Success Message Div Block ID to 'success-message'
let successMessage = document.getElementById('success-message');
If you need help beyond that, just direct message me here on the forum ![]()