Problem loading Wufoo forms in WP 4.1.6 / 4.2.3

Hello, after the latest WP update, something broke the use of javascript in the site – we use Wufoo forms with the following standard embedding code they provide

<div id="wufoo-z16pl4ll1ckw8zy">Fill out my <a href="https://lexpert.wufoo.com/forms/z16pl4ll1ckw8zy">online form</a>.</div>
<script type="text/javascript">// <![CDATA[
var z16pl4ll1ckw8zy;(function(d, t) {
var s = d.createElement(t), options = {
'userName':'lexpert',
'formHash':'z16pl4ll1ckw8zy',
'autoResize':true,
'height':'967',
'async':true,
'host':'wufoo.com',
'header':'show',
'ssl':true};
s.src = ('https:' == d.location.protocol ? 'https://' : 'https://') + 'www.wufoo.com/scripts/embed/form.js';
s.onload = s.onreadystatechange = function() {
var rs = this.readyState; if (rs) if (rs != 'complete') if (rs != 'loaded') return;
try { z16pl4ll1ckw8zy = new WufooForm();z16pl4ll1ckw8zy.initialize(options);z16pl4ll1ckw8zy.display(); } catch (e) {}};
var scr = d.getElementsByTagName(t)[0], par = scr.parentNode; par.insertBefore(s, scr);
})(document, 'script');
// ]]></script>

and it should load the form automatically but it doesn’t.
you can see it action here https://advokatami.bg/wufoo-testing-page/
What could be causing the problem? Any help would be appreciated