Recaptcha enterprise do not execute onSucces - recaptcha

Question

I am trying to implement Recaptcha Enterprise for a login.
But I the onSuccess function is not been executed and I do not get an action_token.
What is missing?
I followed this: https://cloud.google.com/recaptcha-enterprise/docs/implement-tokens#action-token. In Google cloud I have set up the keys and domain.
In the header I have added the JS file:
<script src="https://www.google.com/recaptcha/enterprise.js?render=<?php echo RECAPTCHAKEY; ?>"></script>
On the page I have implemented the example:
<script>
function onSuccess(action_token) {
alert("alert");
const xhr = new XMLHttpRequest();
xhr.open('GET','login.php', false);
// Attach the action-token to the predefined request header
xhr.setRequestHeader("X-Recaptcha-Token", action_token);
xhr.send(null);
}
function onError(reason) {
alert('Response promise rejected: ' + reason);
}
grecaptcha.enterprise.ready(function () {
console.log("READY");
document.getElementById("submit").onclick = () => {
console.log("getElementById");
grecaptcha.enterprise.execute('<?php echo RECAPTCHAKEY ?>', {
}).then(onSuccess, onError);
console.log("execute");
};
});
And also a form:
<form id="login-form" ENCTYPE='multipart/form-data' method='post' action='' name='login'>...
<button type="submit" id="submit" name='submit' class="btn btn-primary"
class="g-recaptcha"
data-sitekey="<?php echo RECAPTCHAKEY; ?>"
data-callback='onSubmit'
data-action='submit'><?php echo $lan->getValue('login'); ?></button>