Hi there,

Thanks for writing to us.

The form is from the WPForms plugin and so you need to add a form then add the add this extra class "nectar-inline-subscribe-form" as shown below :

To create the WPForms form please refer to this guide: https://wpforms.com/docs/creating-first-form/

I hope this proves helpful. Should you have any further questions or encounter any issues, please don't hesitate to reach out.

Best regards,