ValueError: Cannot find any entity corresponding to "[phone number]"

[n-OlegS]

Whenever I add a contact and do /start it gives me the following message:

Unhandled exception on start
Traceback (most recent call last):
File "/Users/oleg/Library/Python/3.10/lib/python/site-packages/telethon/client/updates.py", line 467, in _dispatch_update
await callback(event)
File "/Users/oleg/PycharmProjects/tgsp/TelegramOnlineSpy/spy.py", line 137, in start
account = await client.get_entity(contact.id)
File "/Users/oleg/Library/Python/3.10/lib/python/site-packages/telethon/client/users.py", line 335, in get_entity
result.append(await self._get_entity_from_string(x))
File "/Users/oleg/Library/Python/3.10/lib/python/site-packages/telethon/client/users.py", line 574, in _get_entity_from_string
raise ValueError(
ValueError: Cannot find any entity corresponding to "+11111111111"

The phone number is fake I am using my real one.