Can't launch jupyter notebook and jupyter lab

I can’t launch jupyter notebook and jupyter lab. It all went well before and I don’t know why this happened. When I try to launch my Jupyter, the following message pops out. Can someone help me with this problem?

Traceback (most recent call last):
File “C:\Users\86137\anaconda3\Scripts\”, line 6, in
from notebook.notebookapp import main
File “C:\Users\86137\anaconda3\lib\site-packages\notebook\”, line 45, in
from jinja2 import Environment, FileSystemLoader
File “C:\Users\86137\anaconda3\lib\site-packages\”, line 12, in
from .environment import Environment
File “C:\Users\86137\anaconda3\lib\site-packages\jinja2\”, line 25, in
from .defaults import BLOCK_END_STRING
File “C:\Users\86137\anaconda3\lib\site-packages\jinja2\”, line 3, in
from .filters import FILTERS as DEFAULT_FILTERS # noqa: F401
File “C:\Users\86137\anaconda3\lib\site-packages\jinja2\”, line 13, in
from markupsafe import soft_unicode
ImportError: cannot import name ‘soft_unicode’ from ‘markupsafe’ (C:\Users\86137\anaconda3\lib\site-packages\

I suggest that you try to upgrade both ‘jupyter’ and ‘jupyterlab’ in your conda environment, then try launching both again:

conda update jupyter
conda update jupyterlab