“This email address is already subscribed, thank you!”

Hi Gilbert!

Please customize your message and add the below code in your functions.php by going to appearance > Editor > functions.php

Please use a child theme so your changes remain intact when you update the main theme.

kriesi.at/documentation/enfold/using-a-child-theme/

add_filter('avf_mailchimp_messages', 'avf_mailchimp_messages_mod', 10, 1);
function avf_mailchimp_messages_mod($message) {
    $message['email'] = __('Please provide a valid email address.', 'avia_framework');
    $message['all'] =__('Please fill in all required fields.', 'avia_framework');
    $message['already'] =__('This email address is already subscribed, thank you!', 'avia_framework');
    $message['general'] =__('We are very sorry but something went wrong. Please try again later.', 'avia_framework');
    $message['invalid_field'] =__('Please make sure that your fields are filled in correctly', 'avia_framework');

    return $message;
}

Best regards,
Vinay Kashyap