The registration form cannot be used because either a username or email field is required to process registrations. Please edit the form and add at least the email field. https://reviews.aquatekpro.com/wp-admin/users.php?page=wpum-registration-forms#/
Please note: You will not be able to login until you have registered and activated your account by clicking on the activation link which, is sent to your e-mail address that you used during registration.