The bot does not respond to /start in any way

Question

what am I doing wrong? I'm trying to launch a bot in telegram. I write the code in Pydroid. I loaded the necessary libraries.

from telegram.ext import Updater
import logging
from telegram.ext import CommandHandler

updater = Updater(token='My TOKEN', use_context=True)

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

def start(update, context):
context.bot.send_message(chat_id=update.effective_chat.id, text="I'm a bot, please talk to me!")

start_handler = CommandHandler('start', start)
dispatcher.add_handler(start_handler)

updater.start_polling()

Answer 1

is there any additional console output or error message?

and where do you define dispatcher? or is it provided?

Answer 2

it turns out that this is due to the blocking of telegrams on the territory of the Russian Federation. damn idiots((