Отправить фотографию в вк через Heroku

r = requests.get(url)  
with open('folder1/file_name.img', 'wb') as f:
    f.write(r.content)

a = requests.get('https://twoplayers.info/wp-content/uploads/2017/12/Air-Missions-HIND_0.jpg').content
a1 = vk.method("photos.getMessagesUploadServer")
b = requests.post(a1['upload_url'], files={'photo': open("C:/Users/Sony/Desktop/1057590347-posrednik.jpg", 'rb')}).json()
c = vk.method('photos.saveMessagesPhoto', {'photo': b['photo'], 'server': b['server'], 'hash': b['hash']})[0]
vk.method("messages.send", {"peer_id": 490933633, "message": "Фотка", "attachment": f'photo{c["owner_id"]}_{c["id"]}', "random_id": random.randint(1, 2147483647)})

content = requests.get('https://twoplayers.info/wp-content/uploads/2017/12/Air-Missions-HIND_0.jpg').content
test = open('img.jpg', 'wb')
test.write(content)
test.close()
 
a1 = vk.method("photos.getMessagesUploadServer")
b = requests.post(a1['upload_url'], files={'photo': open("img.jpg", 'rb')}).json()
c = vk.method('photos.saveMessagesPhoto', {'photo': b['photo'], 'server': b['server'], 'hash': b['hash']})[0]
vk.method("messages.send", {"peer_id": 490933633, "message": "Фотка", "attachment": f'photo{c["owner_id"]}_{c["id"]}', "random_id": random.randint(1, 2147483647)})

>>> import io
>>> br = io.BufferedReader(io.BytesIO(con))

b = requests.post(a1['upload_url'], files={'photo': br}).json()

 c = vk.method('photos.saveMessagesPhoto', {'photo': b['photo'], 'server': b['server'], 'hash': b['hash']})[0]
  File "C:\Users\Sony\AppData\Local\Programs\Python\Python37\lib\site-packages\vk_api\vk_api.py", line 640, in method
    raise error
vk_api.exceptions.ApiError: [100] One of the parameters specified was missing or invalid: photos_list is invalid