单击“取消”按钮时出现内部服务器错误

Question

当用户单击“取消”按钮时，我创建了用于删​​除表单的AJAX方法。

    $(document).on('click', '.delete_ajax_nfdocs', function () {
        var myId = $(this).attr('data-id');
        swal({
            title: "Are you sure?",
            text: "Your changes will not be saved.",
            type: "warning",
            showCancelButton: true,
            cancelButtonText: "No, stay here.",
            confirmButtonColor: "#FF7043",
            confirmButtonText: "Yes, cancel it!",
            closeOnConfirm: true,
            showLoaderOnConfirm: true,
        },
        function () {
            $.ajax({
                type: "post",
                url: "/Nfdocuments/onCancel",
                data: { id: myId },
                success: function () {
                    window.location.href = 'Create'
                },
                error: function (data) {
                    swal("Oops", "Something went wrong!", "error");
                }
            });

        })
    });

当我单击console.log中的CANCEL按钮时，我会出错

POST http://localhost:49931/Nfdocuments/onCancel 500 (Internal Server Error)

我检查了功能中的所有内容，但无法弄清楚哪里出错了。 有帮助吗？