Anaconda/Jupyter实验室应用程序启动错误

尝试从anaconda界面启动Jupyter实验室时，我收到以下消息和Jupyter：

Traceback (most recent call last):
File "/Users/anaconda3/lib/python3.7/site-packages/jupyterlab_server/server.py", line 20, in 
from notebook.notebookapp import aliases, flags, NotebookApp as ServerApp
File "/Users/anaconda3/lib/python3.7/site-packages/notebook/notebookapp.py", line 81, in 
from .services.kernels.kernelmanager import MappingKernelManager
File "/Users/anaconda3/lib/python3.7/site-packages/notebook/services/kernels/kernelmanager.py", line 19, in 
from jupyter_client.session import Session
File "/Users/anaconda3/lib/python3.7/site-packages/jupyter_client/__init__.py", line 4, in 
from .connect import *
File "/Users/anaconda3/lib/python3.7/site-packages/jupyter_client/connect.py", line 32, in 
from jupyter_core.paths import jupyter_data_dir, jupyter_runtime_dir, secure_write
ImportError: cannot import name 'secure_write' from 'jupyter_core.paths' (/Users/anaconda3/lib/python3.7/site-packages/jupyter_core/paths.py)

它还返回另一个错误

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/Users/anaconda3/bin/jupyter-lab", line 7, in 
from jupyterlab.labapp import main
File "/Users/anaconda3/lib/python3.7/site-packages/jupyterlab/labapp.py", line 14, in 
from jupyterlab_server import slugify, WORKSPACE_EXTENSION
File "/Users/anaconda3/lib/python3.7/site-packages/jupyterlab_server/__init__.py", line 4, in 
from .app import LabServerApp
File "/Users/anaconda3/lib/python3.7/site-packages/jupyterlab_server/app.py", line 9, in 
from .server import ServerApp
File "/Users/anaconda3/lib/python3.7/site-packages/jupyterlab_server/server.py", line 26, in 
from jupyter_server.base.handlers import ( # noqa
ModuleNotFoundError: No module named 'jupyter_server'

有人知道如何解决这个问题吗