urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='
127.0.0.1', port=39783): Max retries exceeded with url: /session/4bc872da812efb6f9febb7fe76e3d27f/url (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fb6dcf442b0>: Failed to establish a new connection: [Errno 111] Connection refused',))