juptyer notebookを立ち上げても正常に起動しない。 ↓なエラーが出る (pytlesson) C:\anaconda3\envs\pytlesson>jupyter notebook [I 06:01:49.507 NotebookApp] Serving notebooks from local directory: C:\anaconda3\envs\pytlesson [I 06:01:49.507 NotebookApp] The Jupyter Notebook is running at: [I 06:01:49.507…