ERROR 'RPC_CALL_FAIL 401: AUTH_KEY_UNREGISTERED'

[Carlos272]

Hi, I have this problem, help me solve it, please.
The error is as follows: pytg.exceptions.FailException: Error 71: 'RPC_CALL_FAIL 401: AUTH_KEY_UNREGISTERED' (command '[disable_preview] status_online \n')

sender.status_online()
File "/opt/proyecto/lib/python3.5/site-packages/pytg/sender.py", line 630, in command_alias
return self.execute_function(command_name, *args, **kwargs)
File "/opt/proyecto/lib/python3.5/site-packages/pytg/sender.py", line 354, in execute_function
raise e
File "/opt/proyecto/lib/python3.5/site-packages/pytg/sender.py", line 351, in execute_function
return result_parser(message)
File "/opt/proyecto/lib/python3.5/site-packages/pytg/result_parser.py", line 55, in success_fail
raise FailException(json.error_code, json.error)
pytg.exceptions.FailException: Error 71: 'RPC_CALL_FAIL 401: AUTH_KEY_UNREGISTERED' (command '[disable_preview] status_online \n')

[luckydonald]

Something seem to be wrong with authentication. Try getting the CLI to work first.