Почему при ajax запросе сервер выдает (failed) net::ERR_CONNECTION_CLOSED?

var firstHalf =  this.menu.slice(0, 21);
                var secondHalf =  this.menu.slice(21);
                var result = [firstHalf,secondHalf];
                this.isLoading = true;
                for (let i = 0; i < result.length; i++) {
                    let statusCode = 200;
                    axios({
                        method: "post",
                        url: "/admin/menu/addMenu/",
                        header: {
                            "X-CSRF-TOKEN": $('meta[name="csrf-token"]').attr("content")
                        },
                        params: {
                            menu: result[i],
                            startDate: this.selectedDate,
                            order: i + 1
                        }
                    }).then(response => {
                        console.log("ajax")
                        console.log(response.status);
                        console.log(response);
                        if (i+1>= result.length) {
                            this.message = response.data.message;
                            this.modalShow = true;
                            this.isLoading = false;
                            return;
                        }
                    });
                }