Update Jquery version form 1.8.3 to 3.2.1,All ajax calll fails

Update Jquery version form 1.8.3 to 3.2.1,All ajax calll fails

Hello,

 I have updated Version of Jquery from 1.8.3 to 3.2.1.My project fully developed and all Ajax works fine in 1.8.3.But after upgrade version all Ajax call fails.it says 401 Unauthorized in response.

I have no authentication process.

So whats problem?

Sample Ajax looks like...(which was works fine in 1.8.3,but same code not works after upgrade)

      jQuery.ajax({
            type: 'POST',
            contentType: 'application/json; charset=utf-8',
            dataType: 'JSON',
           url: 'Default.aspx/GetData',
            success: function (result) {
         
            },
            error: function (XMLHttpRequest, textStatus, errorThrown) {
            }
        });

Kindly Help.

Thank you,