[FIXED] Applications on Anaconda Navigator(Jupyter Lab & Jupyter notebook) not launching

Issue

I woke up today trying to launch jupyter notebook and I got this error:

Traceback (most recent call last):
File "C:\ProgramData\Anaconda3\Scripts\jupyter-notebook-script.py", line 6, in 
from notebook.notebookapp import main
File "C:\ProgramData\Anaconda3\lib\site-packages\notebook\notebookapp.py", line 41, in 
from jinja2 import Environment, FileSystemLoader
File "C:\ProgramData\Anaconda3\lib\site-packages\jinja2\__init__.py", line 33, in 
from jinja2.environment import Environment, Template
File "C:\ProgramData\Anaconda3\lib\site-packages\jinja2\environment.py", line 15, in 
from jinja2 import nodes
File "C:\ProgramData\Anaconda3\lib\site-packages\jinja2\nodes.py", line 19, in 
from jinja2.utils import Markup
File "C:\ProgramData\Anaconda3\lib\site-packages\jinja2\utils.py", line 642, in 
from markupsafe import Markup, escape, soft_unicode
ImportError: cannot import name 'soft_unicode' from 'markupsafe' (C:\Users\USER\AppData\Roaming\Python\Python37\site-packages\markupsafe\__init__.py)

I've used this software for 2 years and have never seen this error. All anaconda applications bring out one error or the other.

Also getting errors when I try to run jupyter lab.

Traceback (most recent call last):
File "C:\ProgramData\Anaconda3\lib\site-packages\jupyterlab_server\server.py", line 14, in 
from notebook.base.handlers import (
File "C:\ProgramData\Anaconda3\lib\site-packages\notebook\base\handlers.py", line 29, in 
from jinja2 import TemplateNotFound
File "C:\ProgramData\Anaconda3\lib\site-packages\jinja2\__init__.py", line 33, in 
from jinja2.environment import Environment, Template
File "C:\ProgramData\Anaconda3\lib\site-packages\jinja2\environment.py", line 15, in 
from jinja2 import nodes
File "C:\ProgramData\Anaconda3\lib\site-packages\jinja2\nodes.py", line 19, in 
from jinja2.utils import Markup
File "C:\ProgramData\Anaconda3\lib\site-packages\jinja2\utils.py", line 642, in 
from markupsafe import Markup, escape, soft_unicode
ImportError: cannot import name 'soft_unicode' from 'markupsafe' (C:\Users\USER\AppData\Roaming\Python\Python37\site-packages\markupsafe\__init__.py)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\ProgramData\Anaconda3\Scripts\jupyter-lab-script.py", line 5, in 
from jupyterlab.labapp import main
File "C:\ProgramData\Anaconda3\lib\site-packages\jupyterlab\labapp.py", line 14, in 
from jupyterlab_server import slugify, WORKSPACE_EXTENSION
File "C:\ProgramData\Anaconda3\lib\site-packages\jupyterlab_server\__init__.py", line 4, in 
from .app import LabServerApp
File "C:\ProgramData\Anaconda3\lib\site-packages\jupyterlab_server\app.py", line 9, in 
from .server import ServerApp
File "C:\ProgramData\Anaconda3\lib\site-packages\jupyterlab_server\server.py", line 26, in 
from jupyter_server.base.handlers import ( # noqa
ModuleNotFoundError: No module named 'jupyter_server'

Solution

I upgraded my anaconda navigator.

Answered By - Adedolapo0