telethon: RPCError 406: UPDATE_APP_TO_LOGIN

Checklist

• The error is in the library’s code, and not in my own.
• I have searched for this issue before posting it and there isn’t a duplicate.
• I ran pip install -U https://github.com/LonamiWebs/Telethon/archive/master.zip and triggered the bug in the latest version.

Code that causes the issue

from telethon.sync import TelegramClient
...
    client = TelegramClient(phone, api_id, api_hash)
    client.connect()
    if not client.is_user_authorized():
        client.send_code_request(phone)

Traceback

Traceback (most recent call last):
  File "code.py", line 1, in <code>
in _call
    result = await future
telethon.errors.rpcbaseerrors.AuthKeyError: RPCError 406: UPDATE_APP_TO_LOGIN (caused by SendCodeRequest)

I login to my telegram account with this code until yesterday but today I get this error please help me