Testimonial Slider Returning 404 Error

Hi,

There is a testimonial slider on a page of a site I am working on that is returning a 404 error. Here is a screenshot:



The code for the section is:

<span></span><script id="pre536071ad">
setTimeout(function () {
var id = '536071ad';
var script = document.getElementById("pre" + id);
if (!document.getElementById(id) && script) {
var loader = document.createElement('script');
loader.id = id;
loader.src = '//widgets.reviews.reputationwinner.com/assets/w.unmin.js';
script.parentNode.insertBefore(loader, script);
}
}, 0);
</script>

Can anyone help me understand why there is a 404 error being returned. Thanks!