I am trying to get Arelle working on Ubuntu linux 18.04 with Python 3.6.9. Step-1: (Download Arelle software): git clone https://github.com/Arelle/Arelle.git -b lxml Step-2 Install Python LXML: apt-get install -y python-lxml Step-3 Install Python tk: Due to error: ‘No module named tkinter’ …I install: apt-get install python3-tk When it’s time to start Arelle from terminal, I use: I then get