Client() not working

## Description of the problem
Client not working properly. It shows that I'm logging in facebook from some browser on
my phone (I set it up so that it shows me messages when I'm logging in from somewhere) but it crashes in the command prompt.

## Traceback
Traceback (most recent call last):
File "sitakscool.py", line 9, in
client = Client(username, getpass(), max_tries = 1)
File "C:\*\Local\Programs\Python\Python38\lib\site-packages\fbchat\_client.py", line 103, in __init__
self.login(email, password, max_tries, user_agent=user_agent)
File "C:\*\Local\Programs\Python\Python38\lib\site-packages\fbchat\_client.py", line 205, in login
self._state = State.login(
File "C:\*\Local\Programs\Python\Python38\lib\site-packages\fbchat\_state.py", line 149, in login
return cls.from_session(session=session)
File "C:\*\Local\Programs\Python\Python38\lib\site-packages\fbchat\_state.py", line 186, in from_session
fb_dtsg = FB_DTSG_REGEX.search(r.text).group(1)
AttributeError: 'NoneType' object has no attribute 'group'

## Environment information
- Python 3.8.3
- fbchat 1.9.7

No code after _client = Client(..)_ works.

## Code
```
import os
from fbchat import Client
from fbchat.models import *
from getpass import getpass
from time import sleep

username = "MAIL"
client = Client(username, getpass(), max_tries = 1)

if client.isLoggedIn():
name = "GROUP NAME"
friends = client.searchForGroups(name)
friend = friends[0]
thread_type = ThreadType.GROUP

if os.path.exists('fromrtou.txt'):
with open('fromrtou.txt', 'r', encoding='utf-8') as data:
for each_line in data:
if each_line == '\n':
msg = ("######")
else:
msg = (each_line)
client.send(Message(text = msg), thread_id=friend.uid, thread_type=thread_type)
sleep(2)
else:
print("Sellist faili ei eksisteeri!")

client.logout()
else:
print("Midagi laks perse ja ei saanudki sisse logida!")

```