/Users/elliewu/opt/anaconda3/bin/jupyter_mac.command ; exit;
(base) elliewu@Ellies-MBP ~ % /Users/elliewu/opt/anaconda3/bin/jupyter_mac.command ; exit;
Traceback (most recent call last):
File “/Users/elliewu/opt/anaconda3/lib/python3.9/site-packages/notebook/traittypes.py”, line 232, in _resolve_classes
klass = self._resolve_string(klass)
File “/Users/elliewu/opt/anaconda3/lib/python3.9/site-packages/traitlets/traitlets.py”, line 2015, in _resolve_string
return import_item(string)
File “/Users/elliewu/opt/anaconda3/lib/python3.9/site-packages/traitlets/utils/importstring.py”, line 33, in import_item
module = import(package, fromlist=[obj])
ModuleNotFoundError: No module named ‘jupyter_server.contents’

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File “/Users/elliewu/opt/anaconda3/bin/jupyter-notebook”, line 11, in
sys.exit(main())
File “/Users/elliewu/opt/anaconda3/lib/python3.9/site-packages/jupyter_core/application.py”, line 283, in launch_instance
super().launch_instance(argv=argv, **kwargs)
File “/Users/elliewu/opt/anaconda3/lib/python3.9/site-packages/traitlets/config/application.py”, line 1073, in launch_instance
app = cls.instance(**kwargs)
File “/Users/elliewu/opt/anaconda3/lib/python3.9/site-packages/traitlets/config/configurable.py”, line 583, in instance
inst = cls(*args, **kwargs)
File “/Users/elliewu/opt/anaconda3/lib/python3.9/site-packages/traitlets/traitlets.py”, line 1292, in new
inst.setup_instance(*args, **kwargs)
File “/Users/elliewu/opt/anaconda3/lib/python3.9/site-packages/traitlets/traitlets.py”, line 1335, in setup_instance
super(HasTraits, self).setup_instance(*args, **kwargs)
File “/Users/elliewu/opt/anaconda3/lib/python3.9/site-packages/traitlets/traitlets.py”, line 1311, in setup_instance
init(self)
File “/Users/elliewu/opt/anaconda3/lib/python3.9/site-packages/notebook/traittypes.py”, line 223, in instance_init
self._resolve_classes()
File “/Users/elliewu/opt/anaconda3/lib/python3.9/site-packages/notebook/traittypes.py”, line 235, in _resolve_classes
warn(f”{klass} is not importable. Is it installed?”, ImportWarning)
TypeError: warn() missing 1 required keyword-only argument: ‘stacklevel’

Saving session…
…copying shared history…
…saving history…truncating history files…
…completed.

[Process completed]

I can’t launch or open Jupyter Notebook. When I open this error comes first. Need help please.
Thanks.