hello , 

I have a problem for 3 days on an HTTP request of type $. AJAX {()} I explain my code:

the data I have are :

headers : Content-Type  = application/json

body :{
  "UserName": "trinita",
  "Password": "112A" } 

my request http is:

 jQuery.ajax({
     url: data.npsod.conn.server+'Account/Login',
     method: 'POST',
     contentType: 'application/json',
     dataType : "json",
     data:{UserName:"trinita",Password:"112A"}, 
     xhrFields: {
     withCredentials: false
     },
     error: function(){
     alert('failure');
                    }
     
    })

I do not understand why I have this error ,I know that normally it comes from data :{UserName…….} but I have note another solution 

HTTP400:INCORRECT QUERY. The server was unable to process the request because the syntax is not valid.

thank you  :) !