The issue exists on CentOSv8.
Can you retry to do the test at your side with the following packages installed ?

cloudpickle==1.2.2
cycler==0.10.0
future==0.18.2
gym==0.15.4
joblib==0.14.1
kiwisolver==1.1.0
matplotlib==3.1.2
numpy==1.18.1
opencv-python==4.1.2.30
pandas==1.0.0
Pillow==7.0.0
pkg-resources==0.0.0
pyglet==1.3.2
pyparsing==2.4.6
python-dateutil==2.8.1
pytz==2019.3
scikit-learn==0.22.1
scipy==1.4.1
six==1.14.0
sklearn==0.0
torch==1.4.0
torchvision==0.5.0
xlrd==1.2.0

I doubt that maybe it’s something in my environment that is causing this issue.