I have this ajax post which worked when I used test values

However on changing it to real meaningful values (e.g I used my family names as return values) After changing it to (Output, SQuantity, Output and total) it stopped working. Here is my code below

please advise

2. function ehi(e) {
3. 
   
4.     var fd = new FormData($("#Shops")[0]);
5.     $.ajax({
6.        
7.         type: "POST",
8.         url: "/Shopping_Basket/Shop_AddToBasket", //
9.         contentType: false,
10.         processData: false,
11.         data: fd,
12.         success: function (message) {
13. 
    
14.             
15.             $('#Ok').show();
16.             $('#list').show().html(message.MyStatus + ' ' + message.SQuantity + ' ' +  message.Output + '   ' + message.Total);
17.         },
18.         error: function (message) {
19.         }
20.     });
21. 
    
22. 
    
23. /// and on the server side 
25.        public async Task<ActionResult> Shop_AddToBasket(Duo_Basket_and_Products model)
26.         {
28.            var message = new { MyStatus = "0", SQuantity = "1000", Output ="Success", Total = "test"};
29.                     return Json(message);