- поправил скрипт на странице кабинета пользователя.

PhoneStore/Views/PersonalArea/Index.cshtml

@@ -41,33 +41,28 @@
 {
     <script >
         
-        $('.tab-pane').click(function (e){
+        $('.tab-pane').click(async function (e){
             e.preventDefault();
             let userId = $('h2').attr('userId');
-            fetch("https://localhost:5001/Orders/GetAllByUserId/" + userId)
-            .then((response) => {
-                return  response.json();
-            })
-            .then((orders) => {
-                if (orders.length === 0){
-                    $(this).html('<h3>Заказов нет</h3>');
-                }
-                else{
+            
+            let resp = await fetch("https://localhost:5001/Orders/GetAllByUserId/" + userId);
+            if (resp.ok){
                 let content;
-                    $.each(orders, (order) => {
+                let orders = await resp.json();
+                $.each( orders, (i) => {
                 content += `<tr>
-                                           <td>order.id</td>
-                                           <td>order.address</td>
-                                           <td>order.contactPhone</td>
-                                           <td>order.user.Name</td>
-                                           <td>order.phone.Name</td>
+                               <td>${orders[i].userId}</td>
+                               <td>${orders[i].address}</td>
+                               <td>${orders[i].contactPhone}</td>
+                               <td>${orders[i].user.name}</td>
+                               <td>${orders[i].phone.name}</td>
                            </tr>`
-                       
             });
             $('#orders').html(content);
+            }else{
+                alert("Ошибка HTTP: " + response.status);
             }
         });
-        });
         
         let makeTabs = function (){
             let tabs = $(".tabs").find(".tab-items a");