python中的instabot api出现错误400

目前，我想为instagram生成一个机器人程序，该程序应该自动跟踪来自其他帐户的用户，但我遇到了一个错误：python中的instabot api出现了错误400

Python代码：

# importar la clase a utilizar
from instabot import Bot
# crear el nuevo objeto
mi_bot = Bot()
mi_bot.login(username='xxxxxxxx', password='xxxxxxxxx')
mi_bot.follow_followers('xxxxxxxx')

我在cmd上执行它，如下所示

python main.py

得出的错误如下：

2020-02-20 17:23:10,742 - instabot version: 0.107.0 (bot) - INFO - Instabot version: 0.107.0 Started
2020-02-20 17:23:10,773 - instabot version: 0.107.0 (api_login) - INFO - PRE-LOGIN FLOW!... 
2020-02-20 17:23:22,801 - instabot version: 0.107.0 (api) - ERROR - Request returns 400 error!
2020-02-20 17:23:22,801 - instabot version: 0.107.0 (api) - INFO - Instagram's error message: challenge_required
2020-02-20 17:23:22,801 - instabot version: 0.107.0 (api) - INFO - Error type: checkpoint_challenge_required
2020-02-20 17:23:22,801 - instabot version: 0.107.0 (api) - INFO - Checkpoint challenge required...
2020-02-20 17:23:22,816 - instabot version: 0.107.0 (bot_follow) - INFO - Follow followers of: xxxxxxxxxxxx
2020-02-20 17:23:22,816 - instabot version: 0.107.0 (api) - CRITICAL - Not logged in!

我使用的python版本是3.8.1，据我所知是最新版本