Thank you @specialk solved it. The problem was inside in a 3dparty plugin I have removed some piece of code inside it and now work perfect.
The code I have removed is this:
add_action( 'admin_enqueue_scripts', 'dpv_enqueue_script' );
function wp44138_change_comment_form_cookies_consent( $fields ) {
$consent = empty( $commenter['comment_author_email'] ) ? '' : ' checked="checked"';
$fields['cookies'] = '<p class="comment-form-cookies-consent">' .
'<input id="wp-comment-cookies-consent" name="wp-comment-cookies-consent" type="checkbox" value="yes"' . $consent . ' />' .
'<label for="wp-comment-cookies-consent">' . __( '<strong>PRIVACY POLICY:</strong> By leaving a comment, you accept that your message, IP and name are stored on this website. Email is not required to post a comment. Instead of name, you can enter a pseudonym or nickname in the respective section. If you choose not to enter a name, pseudonym or nickname, your comment will be published as <strong>‘Anonymous‘</strong>. Comments will be read and approved in <strong>24-72 hours</strong>. ', 'your-text-domain' ) . '</label>' .
'</p>';
return $fields;
}
add_filter( 'comment_form_default_fields', 'wp44138_change_comment_form_cookies_consent' );
function wpsites_change_comment_form_submit_label($arg) {
$arg['label_submit'] = 'Authorize Comment';
return $arg;
}
add_filter('comment_form_defaults', 'wpsites_change_comment_form_submit_label');