Traceback (most recent call last):
  File "/data/python389/bin/jupyter-nbconvert", line 5, in <module>
    from nbconvert.nbconvertapp import main
  File "/data/python389/lib/python3.8/site-packages/nbconvert/nbconvertapp.py", line 193, in <module>
    class NbConvertApp(JupyterApp):
  File "/data/python389/lib/python3.8/site-packages/nbconvert/nbconvertapp.py", line 252, in NbConvertApp
    Options include {get_export_names()}.
  File "/data/python389/lib/python3.8/site-packages/nbconvert/exporters/base.py", line 145, in get_export_names
    e = get_exporter(exporter_name)(config=config)
  File "/data/python389/lib/python3.8/site-packages/nbconvert/exporters/base.py", line 106, in get_exporter
    exporter = items[0].load()
  File "/data/python389/lib/python3.8/site-packages/importlib_metadata/__init__.py", line 184, in load
    module = import_module(match.group('module'))
  File "/data/python389/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "/data/python389/lib/python3.8/site-packages/jupyter_contrib_nbextensions/__init__.py", line 5, in <module>
    import jupyter_nbextensions_configurator
  File "/data/python389/lib/python3.8/site-packages/jupyter_nbextensions_configurator/__init__.py", line 18, in <module>
    from notebook.base.handlers import APIHandler, IPythonHandler
ModuleNotFoundError: No module named 'notebook.base'
                <style>
                .jp-RenderedHTMLCommon img, .jp-RenderedImage img, .jp-RenderedHTMLCommon svg, .jp-RenderedSVG svg {
                    max-width: 600px;
                    height: auto;
                }
                </style>