Не работает бот Viber

Зарегистрировал бот аккаунт в Viber, заполнил все данные, подтвердил, опубликовал. Залил на сервер файл py который скопировал с документации как пример

from flask import Flask, request, Response
from viberbot import Api
from viberbot.api.bot_configuration import BotConfiguration
from viberbot.api.messages.text_message import TextMessage
from viberbot.api.viber_requests import ViberFailedRequest
from viberbot.api.viber_requests import ViberMessageRequest
from viberbot.api.viber_requests import ViberSubscribedRequest

app = Flask(__name__)
viber = Api(BotConfiguration(
    name='имя',
    avatar='https://upload.wikimedia.org/wikipedia/commons/9/9a/Gull_portrait_ca_usa.jpg',
    auth_token='мойтокен'
))


@app.route('/', methods=['POST'])
def incoming():
    # every viber message is signed, you can verify the signature using this method
    if not viber.verify_signature(request.get_data(), request.headers.get('X-Viber-Content-Signature')):
        return Response(status=403)

    # this library supplies a simple way to receive a request object
    viber_request = viber.parse_request(request.get_data())

    if isinstance(viber_request, ViberMessageRequest):
        message = viber_request.message
        # lets echo back
        viber.send_messages(viber_request.sender.id, [
            message
        ])
    elif isinstance(viber_request, ViberSubscribedRequest):
        viber.send_messages(viber_request.get_user.id, [
            TextMessage(text="thanks for subscribing!")
        ])
    elif isinstance(viber_request, ViberFailedRequest):
        print("error")

    return Response(status=200)

if __name__ == "__main__":
    context = ('server.crt', 'server.key')
    app.run(host='0.0.0.0', port=443, debug=True, ssl_context=context)

установил Flask на сервер, добавил сертификаты

openssl genrsa 2048 > server.key
chmod 400 server.key
openssl req -new -x509 -nodes -sha256 -days 365 -key server.key -out server.cert

зашел на страницу бота, а чат так и не открывается введите сюда описание изображения

как начать переписку с ботом?

UPDATE: Обновил немного код, вот лог:

2020-11-11 09:37:17,706 - werkzeug - INFO -  * Running on https://0.0.0.0:443/ (Press CTRL+C to quit)
2020-11-11 09:37:17,707 - werkzeug - INFO -  * Restarting with stat
2020-11-11 09:37:18,088 - werkzeug - WARNING -  * Debugger is active!
2020-11-11 09:37:18,089 - werkzeug - INFO -  * Debugger pin code: 284-971-705
2020-11-11 09:37:22,700 - viber.bot.api - DEBUG - setting webhook to url: ип сервера/
2020-11-11 09:37:22,744 - requests.packages.urllib3.connectionpool - DEBUG - Starting new HTTPS connection (1): chatapi.viber.com
Exception in thread Thread-2:
Traceback (most recent call last):
  File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.5/threading.py", line 862, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/lib/python3/dist-packages/werkzeug/serving.py", line 670, in inner
    fd=fd)
  File "/usr/lib/python3/dist-packages/werkzeug/serving.py", line 564, in make_server
    passthrough_errors, ssl_context, fd=fd)
  File "/usr/lib/python3/dist-packages/werkzeug/serving.py", line 500, in __init__
    self.socket = ssl_context.wrap_socket(sock, server_side=True)
  File "/usr/lib/python3/dist-packages/werkzeug/serving.py", line 422, in wrap_socket
    ssl_version=self._protocol, **kwargs)
  File "/usr/lib/python3.5/ssl.py", line 1077, in wrap_socket
    ciphers=ciphers)
  File "/usr/lib/python3.5/ssl.py", line 699, in __init__
    self._context.load_cert_chain(certfile, keyfile)
FileNotFoundError: [Errno 2] No such file or directory

2020-11-11 09:37:23,080 - viber.bot.api - DEBUG - setting webhook to url: ип сервера/
2020-11-11 09:37:23,119 - requests.packages.urllib3.connectionpool - DEBUG - Starting new HTTPS connection (1): chatapi.viber.com
2020-11-11 09:37:23,139 - requests.packages.urllib3.connectionpool - DEBUG - https://chatapi.viber.com:443 "POST /pa/set_webhook HTTP/1.1" 200 88
2020-11-11 09:37:23,491 - requests.packages.urllib3.connectionpool - DEBUG - https://chatapi.viber.com:443 "POST /pa/set_webhook HTTP/1.1" 200 88

Ответы (0 шт):