Problem with send_notification

class Index(TemplateView):
    def get(self,request):
        form = OrderModelForm
        return render(request, 'index.html', {'form':form})
    def post(self,request):
        url = request.POST.get('url')
        user_mail = request.POST.get('email')
        current_order = OrderModel.objects.create(url = url, email=user_mail)
        current_order.save()
        post_dict = request.POST.copy()
        post_dict['order_number'] = current_order.pk
        print('мой номер', post_dict['order_number'])
        json_data = json.dumps(post_dict)
        start_parsing.delay(json_data)#url=url, user_mail=user_mail, order_number=current_order.pk)

        return render(request, 'thanks.html', {})


@task
def start_parsing(data):#url, user_mail, order_number):
    normal_data = json.loads(data)
    url = normal_data.get('url')
    email = normal_data.get('email')
    current_order_pk = normal_data.get('order_number')
    print('hi, my number is', str(current_order_pk))
    main_parse_process(url=url, order_number=current_order_pk) #Парсер должен сохранять изображения по нужному адресу с привязкой к объекту отчета
    send_notification(user_mail=email, order_number=current_order_pk)


def send_notification(user_mail, order_number):
    mail_host = "oriflamesender@gmail.com"
    recipients= [user_mail,]
    url_in_letter = 'http://{}/show_result/{}/'.format('test',format(str(order_number)))
    message = '''Здравствуйте! Ваш запрос на сайте IRR Parser обработан. Вот ссылка на полученные графики:
    {}'''.format(url_in_letter)
    subject= 'Отчет с IRR Parser'

    send_mail(subject, message, mail_host, recipients, fail_silently=False)