Issues launching Anaconda apps

[Ivan Aguilar]

I am trying to open spyder , jupiter, and Rstudio but the following message appear and I have zero clue of whats happen and how to fix it. Please help:

Traceback (most recent call last):
File "C:\Users\Ivan\anaconda3\Scripts\jupyter-notebook-script.py", line 6, in
from notebook.notebookapp import main
File "C:\Users\Ivan\AppData\Roaming\Python\Python38\site-packages\notebook\notebookapp.py", line 49, in
from zmq.eventloop import ioloop
File "C:\Users\Ivan\AppData\Roaming\Python\Python38\site-packages\zmq\__init__.py", line 55, in
from zmq import backend
File "C:\Users\Ivan\AppData\Roaming\Python\Python38\site-packages\zmq\backend\__init__.py", line 40, in
reraise(*exc_info)
File "C:\Users\Ivan\AppData\Roaming\Python\Python38\site-packages\zmq\utils\sixcerpt.py", line 34, in reraise
raise value
File "C:\Users\Ivan\AppData\Roaming\Python\Python38\site-packages\zmq\backend\__init__.py", line 27, in
_ns = select_backend(first)
File "C:\Users\Ivan\AppData\Roaming\Python\Python38\site-packages\zmq\backend\select.py", line 28, in select_backend
mod = __import__(name, fromlist=public_api)
File "C:\Users\Ivan\AppData\Roaming\Python\Python38\site-packages\zmq\backend\cython\__init__.py", line 6, in
from . import (constants, error, message, context,
ImportError: cannot import name 'constants' from partially initialized module 'zmq.backend.cython' (most likely due to a circular import) (C:\Users\Ivan\AppData\Roaming\Python\Python38\site-packages\zmq\backend\cython\__init__.py)

[David Kun]

Can you do a "pip freeze" to get a list of all python packages & their versions?  

I wasn't able to reproduce the error using pyzmq version 20.0.0 in python 3.8.5.