"Error: Invalid ReCAPTCHA client id" when executing an invisible captcha

I'm trying to implement Google's Invisible reCAPTCHA in a HTML form in a Wordpress website.

##In the `head`

First, I have the script that sets up the callbacks and binds the submit event of the form to the verification:

jQuery(document).ready(function() {
var valid = false;

window.recaptchaOkay = function(token) {
valid = true;
jQuery('#cadastro').submit();
};

document.getElementById('cadastro').addEventListener('submit', function validate(event) {
if (valid) {
return true;
}

var cap = document
.getElementById('cadastro')
.querySelector('.g-recaptcha');
grecaptcha.execute(cap);

event.preventDefault();
return false;
});
});

Then, I load the reCAPTCHA script, precisely as indicated in the documentation:

<script src="https://www.google.com/recaptcha/api.js" async defer></script>

##In the `body`

And this is the form I'm using:

<form action="https://example.com/" method="post" id="cadastro">
<div
class="g-recaptcha"
data-sitekey="6Lc0jC4UAAAAANlXbqGWNlwyW_e1kEB89zLTfMer"
data-callback="recaptchaOkay"
data-size="invisible"
id="cadastro-captcha">
</div>
<button type="submit" id="cadastro-submit">Enviar</button>
</form>

##What happens

I fill the form, submit it, and the following error is thrown (in the line with `grecaptcha.execute`):

<!-- language: lang-none -->

Error: Invalid ReCAPTCHA client id: [object HTMLDivElement]

Also tried just passing the `cadastro-captcha` ID directly to that function as a string (e.g. `grecaptcha.execute("cadastro-captcha")`), yet the same error happens (bar the id being different, obviously). Equivalently, if I pass no argument, the same error happens, except it refers to `undefined`.

**Try this one :--**

The grecaptcha.reset() method accepts an optional widget_id parameter, and defaults to the first widget created if unspecified. A widget_id is returned from the grecaptcha.render() method for each widget created. So you need to store this id, and use it to reset that specific widget:

var widgetId = grecaptcha.render(container);
grecaptcha.reset(widgetId);

If More information then Read google recaptcha docs:--

[To see links please register here]