Unable to run Anaconda after updating to the new version

Technical Topics
1

On a Linux Mint PC, i updated Anaconda to the last version but now I’m not able to run the software.
When I digit anaconda-navigator I get this error:

digitanaconda-navigator                                                                                                                         
Traceback (most recent call last):                                                                                                                                         
  File "/home/xap/anaconda3/bin/anaconda-navigator", line 7, in <module>                                                                                                   
    from anaconda_navigator.app.main import main                                                                                                                           
  File "/home/xap/anaconda3/lib/python3.11/site-packages/anaconda_navigator/app/main.py", line 19, in <module>                                                             
    from anaconda_navigator.app.start import start_app                                                                                                                     
  File "/home/xap/anaconda3/lib/python3.11/site-packages/anaconda_navigator/app/start.py", line 32, in <module>                                                            
    from anaconda_navigator.widgets.main_window import MainWindow                                                                                                          
  File "/home/xap/anaconda3/lib/python3.11/site-packages/anaconda_navigator/widgets/main_window/__init__.py", line 28, in <module>                                         
    from anaconda_navigator.api.anaconda_api import AnacondaAPI                                                                                                            
  File "/home/xap/anaconda3/lib/python3.11/site-packages/anaconda_navigator/api/anaconda_api.py", line 29, in <module>                                                     
    from anaconda_navigator.api.client_api import ClientAPI                                                                                                                
  File "/home/xap/anaconda3/lib/python3.11/site-packages/anaconda_navigator/api/client_api.py", line 21, in <module>                                                       
    import binstar_client                                                                                                                                                  
  File "/home/xap/anaconda3/lib/python3.11/site-packages/binstar_client/__init__.py", line 13, in <module>                                                                 
    import defusedxml.ElementTree as ET                                                                                                                                    
ModuleNotFoundError: No module named 'defusedxml'          a o incolla il codice qui
2

Good morning,

Thank you so much for contacting us, I will give you a list of possible solutions, all of them require you to use the Anaconda Prompt, you can use your terminal for that.

Quick starting guide:
https://conda.io/projects/conda/en/latest/user-guide/getting-started.html

From the Anaconda Prompt launch these commands:

anaconda-navigator --reset
conda update -n base conda
anaconda-navigator
conda --no-plugins update -n base -c defaults conda

If it still won’t open please send us a screenshot with the output of the Anaconda Prompt, then disable your internet connection and launch Navigator and tell us if it opens, we are happy to assist you.

3 
anaconda-navigator --reset


Traceback (most recent call last):
  File "/home/xap/anaconda3/bin/anaconda-navigator", line 7, in <module>
    from anaconda_navigator.app.main import main
  File "/home/xap/anaconda3/lib/python3.11/site-packages/anaconda_navigator/app/main.py", line 19, in <module>
    from anaconda_navigator.app.start import start_app
  File "/home/xap/anaconda3/lib/python3.11/site-packages/anaconda_navigator/app/start.py", line 32, in <module>
    from anaconda_navigator.widgets.main_window import MainWindow
  File "/home/xap/anaconda3/lib/python3.11/site-packages/anaconda_navigator/widgets/main_window/__init__.py", line 28, in <module>
    from anaconda_navigator.api.anaconda_api import AnacondaAPI
  File "/home/xap/anaconda3/lib/python3.11/site-packages/anaconda_navigator/api/anaconda_api.py", line 29, in <module>
    from anaconda_navigator.api.client_api import ClientAPI
  File "/home/xap/anaconda3/lib/python3.11/site-packages/anaconda_navigator/api/client_api.py", line 21, in <module>
    import binstar_client
  File "/home/xap/anaconda3/lib/python3.11/site-packages/binstar_client/__init__.py", line 13, in <module>
    import defusedxml.ElementTree as ET
ModuleNotFoundError: No module named 'defusedxml'


conda update -n base conda
Channels:
 - defaults
 - conda-forge
Platform: linux-64
Collecting package metadata (repodata.json): done
Solving environment: done

# All requested packages already installed.


anaconda-navigator
Traceback (most recent call last):
  File "/home/xap/anaconda3/bin/anaconda-navigator", line 7, in <module>
    from anaconda_navigator.app.main import main
  File "/home/xap/anaconda3/lib/python3.11/site-packages/anaconda_navigator/app/main.py", line 19, in <module>
    from anaconda_navigator.app.start import start_app
  File "/home/xap/anaconda3/lib/python3.11/site-packages/anaconda_navigator/app/start.py", line 32, in <module>
    from anaconda_navigator.widgets.main_window import MainWindow
  File "/home/xap/anaconda3/lib/python3.11/site-packages/anaconda_navigator/widgets/main_window/__init__.py", line 28, in <module>
    from anaconda_navigator.api.anaconda_api import AnacondaAPI
  File "/home/xap/anaconda3/lib/python3.11/site-packages/anaconda_navigator/api/anaconda_api.py", line 29, in <module>
    from anaconda_navigator.api.client_api import ClientAPI
  File "/home/xap/anaconda3/lib/python3.11/site-packages/anaconda_navigator/api/client_api.py", line 21, in <module>
    import binstar_client
  File "/home/xap/anaconda3/lib/python3.11/site-packages/binstar_client/__init__.py", line 13, in <module>
    import defusedxml.ElementTree as ET
ModuleNotFoundError: No module named 'defusedxml'


conda --no-plugins update -n base -c defaults conda

CondaValueError: You have chosen a non-default solver backend (libmamba) but it was not recognized. Choose one of: classic

I disabled internet connection as you suggested me, and I launche anaconda-navigator, but I got the same error.
Best regards
Beppe

4

The problem arouse after upgrading to last conda version.
How could I donwgrade to previous conda version?

5

I solved by reinstalling everything.