Also see:
Windows
choco install python3
# REBOOT
pip3 install pip --upgrade
pip3 install json
python3 wekan.py
Debian/Ubuntu
sudo apt-get -y install python3 python3-pip python3-simplejson
sudo pip3 install pip --upgrade
chmod +x wekan.py
./wekan.py
Below code works now, fixed at 2020-10-29.
Change these: