How to display telegram bot messages to the network itself?

Question

Python

problem: an ancient project, it used to run perfectly, but now a draft of a regular telegram bot is failing. Namely, it does not give any answers in the telegram itself. There is text in the output console, but nothing in the cart itself. I tried to reinstall the whole python from 0 with cleaning modules, rewrite this draft from scratch. What is the problem?

from telegram.ext import Updater, CommandHandler

from glob import glob
from random import choice
import logging

logging.basicConfig(format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
                    level = logging.INFO,
                    filename='bot.log'
                    )

def greet_user(bot, update):
  text = 'Привет, меня зовут бот Name!\n'
  print(text)
  text2 = "text"
  update.message.reply_text(text + text2)
  text3 = 'Хорошего дня, надеюсь, мы увидимся ещё!'
  update.message.reply_text(text3)

def version_bot(bot, update):
  verinfo = "text"
  print(verinfo)
  update.message.reply_text(verinfo)

def send_cat_picture(bot, update):
    cat_list = glob('images/cat*.jp*g')
    cat_pic = choice(cat_list)
    bot.send_photo(chat_id=update.message.chat.id, photo=open(cat_pic, 'rb'))

def main():
  mybot = Updater("TOKEN")
  logging.info('Бот запускается...')
  dp = mybot.dispatcher
  dp.add_handler(CommandHandler('start', greet_user))
  dp.add_handler(CommandHandler('cat', send_cat_picture))
  dp.add_handler(CommandHandler('version', version_bot))
  mybot.start_polling()
  mybot.idle()

main()