How to attach Invisible reCaptcha to AjaxForm + FormIt?

Question

MODX

I'm trying to attach Invisible reCaptcha to forms, using the recaptchav2 add-on Form
call

form chunk

<form id="contact-page-form" action="" method="post" class="ajax_form">
    <div class="form-group">
        <input type="text" name="name" required="" class="form-control" placeholder="Ваше имя*" value="">
        <span class="error error_name"></span>
    </div>
    <div class="form-group">
        <input type="email" name="email" class="form-control" placeholder="Ваш email*" value="">
        <span class="error error_name"></span>
    </div>
    <div class="form-group">
        <input type="text" class="form-control" id="phone" name="phone" required="" placeholder="Ваш телефон*" value="">
        <span class="error error_name"></span>
    </div>
    <div class="form-group">
        <textarea rows="4" name="message" required="" class="form-control word-count" data-maxlength="200" data-info="textarea-words-info" placeholder="Сообщение*"></textarea>
        <span class="error error_name"></span>
    </div>
    <div class="form-group form-check">
        <input type="checkbox" class="form-check-input" id="privacyCheck" required="">
        <span class="error error_name"></span>
        <label class="form-check-label" for="privacyCheck">Согласен на обработку персональных данных</label>
    </div>
    <p class="text-small">Ставя отметку, я даю свое согласие на обработку моих персональных данных в соответствии с законом №152-ФЗ «О персональных данных» от 27.07.2006 и принимаю условия <a href="" rel="nofollow" target="_blank">Пользовательского соглашения</a></p>
    <div class="text-center">
        
        
    </div>
    
    
</form>

recaptchav2_invisible_html chunk

<script src="https://www.google.com/recaptcha/api.js" async defer></script>
<script>
    function recaptchaV2SubmitForm(response) {
        return new Promise(function() {
            document.getElementById('').submit();
        })
    }
</script>
<button type="submit" class="btn btn-landcad big-btn g-recaptcha" data-sitekey="" data-callback="recaptchaV2SubmitForm">Отправить</button>

I get an error after clicking submit
Please select the checkbox in the ReCaptcha image.