cannot import name 'master_bar' from 'fastprogress'

I used spyder and jupyter notebook from Anaconda 64-bit and recently I installed fastai 1.0.34 in a virtual environment using

conda install -v -v fastai fastai.

The system checked all dependencies and asked if I want to proceed with fastai 1.0.34. I agreed and the process continued. I could see my installed package in that environment. To verify that my installation was correct, I ran

from fastai import *

I got the following error. What should I do?

ImportError Traceback (most recent call last)
in
----> 1 from fastai import *

~\Anaconda3\envs\fastai_env\lib\site-packages\fastai\__init__.py in
----> 1 from .basic_train import *
2 from .callback import *
3 #from .callbacks import *
4 from .core import *
5 from .basic_data import *

~\Anaconda3\envs\fastai_env\lib\site-packages\fastai\basic_train.py in
1 "Provides basic training and validation with `Learner`"
----> 2 from .torch_core import *
3 from .basic_data import *
4 from .callback import *
5

~\Anaconda3\envs\fastai_env\lib\site-packages\fastai\torch_core.py in
1 "Utility functions to help deal with tensors"
----> 2 from .imports.torch import *
3 from .core import *
4
5 AffineMatrix = Tensor

~\Anaconda3\envs\fastai_env\lib\site-packages\fastai\imports\__init__.py in
----> 1 from .core import *
2 from .torch import *

~\Anaconda3\envs\fastai_env\lib\site-packages\fastai\imports\core.py in
13 from dataclasses import dataclass, field
14 from enum import Enum, IntEnum
---> 15 from fastprogress import master_bar, progress_bar
16 from functools import partial, reduce, singledispatch
17 from pdb import set_trace

ImportError: cannot import name 'master_bar' from 'fastprogress' (C:\Users\hferdina\Anaconda3\envs\fastai_env\lib\site-packages\fastprogress\__init__.py)

Reproduce `from fastai import *` en el entorno virtual de Anaconda indicado e inspecciona el `fastprogress/__init__.py` instalado. Compara esa importación con el punto de entrada `fastai/imports/core.py` mostrado en el traceback. Se considera terminado cuando el entorno indicado puede importar `master_bar` sin el ImportError.

Escrito por el modelo de indexación a partir del texto del issue.