JupyterDash.infer_jupyter_proxy_config() - OSError: Unable to communicate ...

dash 튜토리얼 중 OSError:
OSError: Unable to communicate with the jupyter_dash notebook or JupyterLab
extension required to infer Jupyter configuration.

코드 최상단에 아래 코드 실행

from jupyter_dash.comms import _send_jupyter_config_comm_request
_send_jupyter_config_comm_request()