JS error in theme

Hi,

We are using the-bootstrap and are having an issue where code is inserted into the page in the footer area by wp_footer() call which has a JS error.

This is the code that gets inserted:

if (jQuery("ul (li.page_item):has(ul.children)").length > 0) {
	  jQuery("ul (li.page_item):has(ul.children)").hover(function () {
            jQuery(this).children("a").removeAttr('href');
            jQuery(this).children("a").css('cursor', 'default');
            jQuery(this).children("a").click(function () {
              return false;
            });
          });
 	}
	else if (jQuery("ul (li.menu-item):has(ul.sub-menu)").length > 0) {
          jQuery("ul (li.menu-item):has(ul.sub-menu)").hover(function () {
            jQuery(this).children("a").removeAttr('href');
            jQuery(this).children("a").css('cursor', 'default');
            jQuery(this).children("a").click(function () {
              return false;
            });
          });
	}

If I comment out wp_footer() in footer.php, then this code goes away.

When that code is in the template we get the following JS error:
Error: Syntax error, unrecognized expression: ul (li.page_item):has(ul.children)

Does anyone know why this code is being inserted, by what and where?

Thank you.