NameError: name 'IN_NOTEBOOK' is not defined

Part 1 (2020)
3

More details on the problem:

1 #hide
----> 2 from utils import *

/notebooks/course-v4/nbs/utils.py in
1 # Numpy and pandas by default assume a narrow screen - this fixes that
2 from fastai.vision.all import *
----> 3 from nbdev.showdoc import *
4 from ipywidgets import widgets
5 from pandas.api.types import CategoricalDtype

/opt/conda/envs/fastai/lib/python3.8/site-packages/nbdev/init.py in
5 if IN_IPYTHON:
6 from .flags import *
----> 7 from .showdoc import show_doc
8 #from .export import notebook2script

/opt/conda/envs/fastai/lib/python3.8/site-packages/nbdev/showdoc.py in
12 from nbconvert import HTMLExporter
13
—> 14 if IN_NOTEBOOK:
15 from IPython.display import Markdown,display
16 from IPython.core import page

NameError: name ‘IN_NOTEBOOK’ is not defined