Jupyter安装nbextensions启动提示没有nbextensions库

错误日志 ModuleNotFoundError: No module named 'jupyter_nbextensions_configurator' Traceback (most recent call last): File "/usr/local/Cellar/jupyterlab/2.0.1/libexec/lib/python3.7/site-packages/notebook/notebookapp.py", line 1670, in init_server_extensions mod = importlib.import_module(modulename)