ACP2E-3710: small fix

Author: alzota

lib/web/mage/validation/validation.js

@@ -13,7 +13,7 @@ define([
     $.each({
         'validate-grouped-qty': [
             function (value, element) {
-                let inputValue = parseFloat(element.value) || 0;
+                let inputValue = parseFloat($(element).val()) || 0;
 
                 return inputValue > 0;
             },