jupyter notebook の internal server error

前提・実現したいこと

jupyter notebookをコマンドプロンプトから入力してURLが表示されてそれをコピペしてjupyter notebookを起動しています。そしてipynbファイルを開こうとするとinternal server errorが出てきます。またコマンドプロンプトでも上のほうにエラーを吐いています。解決策はありますでしょうか。

発生している問題・エラーメッセージ

C:\Users\name>jupyter notebook
[W 14:14:51.478 NotebookApp] Error loading server extension jupyter_nbextensions_configurator
    Traceback (most recent call last):
      File "C:\Anaconda3\lib\site-packages\notebook\notebookapp.py", line 1670, in init_server_extensions
        mod = importlib.import_module(modulename)
      File "C:\Anaconda3\lib\importlib\__init__.py", line 127, in import_module
        return _bootstrap._gcd_import(name[level:], package, level)
      File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
      File "<frozen importlib._bootstrap>", line 983, in _find_and_load
      File "<frozen importlib._bootstrap>", line 965, in _find_and_load_unlocked
    ModuleNotFoundError: No module named 'jupyter_nbextensions_configurator'
[I 14:14:51.524 NotebookApp] JupyterLab extension loaded from C:\Anaconda3\lib\site-packages\jupyterlab
[I 14:14:51.524 NotebookApp] JupyterLab application directory is C:\Anaconda3\share\jupyter\lab
[I 14:14:51.543 NotebookApp] Serving notebooks from local directory: C:\Users\赤松　流空
[I 14:14:51.543 NotebookApp] The Jupyter Notebook is running at:
[I 14:14:51.543 NotebookApp] http://localhost:8888/?token=386200406ba258b080162972c3fbff2c9b5b2542beeb367d
[I 14:14:51.543 NotebookApp]  or http://127.0.0.1:8888/?token=386200406ba258b080162972c3fbff2c9b5b2542beeb367d
[I 14:14:51.543 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 14:14:51.596 NotebookApp]

    To access the notebook, open this file in a browser:
        file:///C:/Users/%E8%B5%A4%E6%9D%BE%E3%80%80%E6%B5%81%E7%A9%BA/AppData/Roaming/jupyter/runtime/nbserver-11100-open.html
    Or copy and paste one of these URLs:
        http://localhost:8888/?token=386200406ba258b080162972c3fbff2c9b5b2542beeb367d
     or http://127.0.0.1:8888/?token=386200406ba258b080162972c3fbff2c9b5b2542beeb367d