refs #19651 [finc] bugfix advanced search: check for attribute aria-label

themes/finc/js/advanced_search.js

@@ -91,7 +91,9 @@ function addGroup(_firstTerm, _firstField, _join) {
   $newGroup.find('.adv-group-label') // update label
     .attr('for', 'search_lookfor' + nextGroup + '_0');
   $newGroup.attr('id', 'group' + nextGroup);
-  $newGroup.attr('aria-label', $newGroup.attr('aria-label').replace('0', nextGroup + 1));
+  if ($newGroup.attr('aria-label')) {
+    $newGroup.attr('aria-label', $newGroup.attr('aria-label').replace('0', nextGroup + 1));
+  }
   $newGroup.find('.search_place_holder')
     .attr('id', 'group' + nextGroup + 'Holder')
     .removeClass('hidden');