ImportError: IProgress not found. Please update jupyter and ipywidgets although it is installed

I tried everything you mentioned in a new environment using conda and I had another issue related to the version of ipywidgets (a bug found in Github with comments saying that got solved after using last version). I solved the problem I had installing last version of ipywidgets. Here is my process:

  1. Create a new environment using conda (I use miniconda):
conda create --name teststackoverflow python=3.7
  1. Activate new environment:
conda activate teststackoverflow
  1. Install jupyter:
pip install jupyter
  1. Install all the libraries without specific versions to get the last ones:
pip install ipywidgets widgetsnbextension pandas-profiling
  1. Run jupyter notebook in the console to turn on the notebooks server and create a new notebook.
  2. Run this line in a new cell:
!jupyter nbextension enable --py widgetsnbextension

With the result:

Enabling notebook extension jupyter-js-widgets/extension...
      - Validating: OK
  1. Run some sample code to define df:
import pandas as pd
df = pd.DataFrame({'A': [1, 2, 3, 4], 'B': [1, 2, 3, 4]})
  1. Run the code you provided:
from pandas_profiling import ProfileReport
profile = ProfileReport(df, title="Pandas Profiling Report", explorative=True)

Final output looks good:
Final result of running step number 8

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