ENGCOM-5590: Resolve Useless "Checkbox" at "Newsletter Problems Report", console error when clicking (issue 24102) #24104

Author: sidolov

app/code/Magento/Newsletter/view/adminhtml/templates/problem/list.phtml

@@ -17,10 +17,12 @@ require(["prototype", "mage/adminhtml/events"], function(){
 
     problemController = {
         checkCheckboxes:function (controlCheckbox) {
-            var elements = $('problemGrid').getElementsByClassName('problemCheckbox');
-            elements.each(function (obj) {
-                obj.checked = controlCheckbox.checked;
-            });
+            var elements = $$('input.problemCheckbox');
+            if (elements && elements.length) {
+                elements.each(function (obj) {
+                    obj.checked = controlCheckbox.checked;
+                });
+            }
         },
         rowClick:function (e) {
             if (!Event.element(e).hasClassName('problemCheckbox')) {