下载插件失败后，打开总报错，每个都是，卸载再安装还会，这是lab的报错Traceback (most recent call last):File "D:\computer\python\anaconda3\lib\site-packages\jupyterlab_server\server.py", line 20, infrom notebook.notebookapp import aliases, flags, NotebookApp as ServerAppFile "D:\computer\python\anaconda3\lib\site-packages\notebook\notebookapp.py", line 83, infrom .services.contents.manager import ContentsManagerFile "D:\computer\python\anaconda3\lib\site-packages\notebook\services\contents\manager.py", line 17, infrom nbformat import sign, validate as validate_nb, ValidationErrorFile "C:\Users\17703\AppData\Roaming\Python\Python37\site-packages\nbformat\sign.py", line 26, infrom traitlets import Any, Bool, Bytes, Callable, Enum, Instance, Integer, Unicode, default, observeImportError: cannot import name 'Callable' from 'traitlets' (D:\computer\python\anaconda3\lib\site-packages\traitlets_init_.py)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):File "D:\computer\python\anaconda3\Scripts\jupyter-lab-script.py", line 5, infrom jupyterlab.labapp import mainFile "D:\computer\python\anaconda3\lib\site-packages\jupyterlab\labapp.py", line 14, infrom jupyterlab_server import slugify, WORKSPACE_EXTENSIONFile "D:\computer\python\anaconda3\lib\site-packages\jupyterlab_server_init_.py", line 4, infrom .app import LabServerAppFile "D:\computer\python\anaconda3\lib\site-packages\jupyterlab_server\app.py", line 9, infrom .server import ServerAppFile "D:\computer\python\anaconda3\lib\site-packages\jupyterlab_server\server.py", line 26, infrom jupyter_server.base.handlers import ( # noqaModuleNotFoundError: No module named 'jupyter_server'