Why is the mailing list not sent to all users?

Question

Python

Hello everyone, the question is, why is the mailing list not sent to users of the bot?

@dp.message_handler(content_types=['photo'])
async def checker(message: types.Message):
    number = random.randint(1,999999)
    text = message.caption
    await message.photo[-1].download(f'{number}.jpg')
    photo = open(f'{number}.jpg','rb')
    users = cursor.execute("SELECT user FROM users").fetchall()
    otpr = 0
    nootpr = 0
    print(users)
    for user in users:
        try:
            await bot.send_photo(user[0],photo = photo,caption = text)
            otpr = otpr + 1
            time.sleep(0.3)
        except Exception:
            nootpr = nootpr + 1
            pass
    await bot.send_message(message.chat.id,text = f"<b>Рассылка завершена</b>\n\n<b>Отправлено: {otpr}\nНе отправлено: {nootpr}</b>",parse_mode = 'HTML')

The original result is...

Answer 1

Who knows why, but try to add

except Exception as e:
    print(e)

Then everything will become clearer.
And do not use yet time.sleep(), otherwise the bot will wait for the entire program to complete. It is betteracyncio.sleep()