Search doesn’t return anything

Might not be the real cause, but you have a JS error due to badly formatted JS – the following lines:

<script type="text/javascript">
jQuery(document).ready(function( $ ){
jQuery(“a[href=’#aiwoosearch#’]”).attr(‘onclick’, ‘parentNode.submit();’);
jQuery(“a[href=’#aiwoosearch#’]”).attr(“href”, “javascript:;”);
});
</script>

Those quote marks are wrong “ & ‘ try " & ' instead and test again with your JS console open in inspector.