Hi!
I can see the problem now. The solution would be if you add the following line to the header.php file in your template file:
<script src="://testing.quehaypahacer.com/wp-content/plugins/ajax-search-pro/js/jquery.ajaxsearchpro.min.js"></script>
As for the box that is appearing, it’s coming from the template css files, but there is a simple solution for that. Add these lines also to the header.php file:`
.probox .loading {
border: none !important;
opacity: 1 !important;
padding: 0 !important;
position: static !important;
z-index: 10100;
}`