How to install apt-offline package into Debian 10 (Buster)

Hi Robert,

I am trying to install/update BBBw without internet for the first time setup. For example, to install minicom package by offline: (as the first step on a new board )
sudo apt-offline set --install-packages minicom --update apt-offline.sig
or
sudo apt-offline set vim-offline.sig --install-packages vim

I got the following errors: ( the msg of the second command for vim is pasted below)

debian@beaglebone:~/usb/pkg_install$ sudo apt-offline set vim-offline.sig --install-packages vim
Traceback (most recent call last):
File “/usr/bin/apt-offline”, line 25, in
from apt_offline_core.AptOfflineCoreLib import main
File “/usr/lib/python3/dist-packages/apt_offline_core/AptOfflineCoreLib.py”, line 45, in
import apt
ModuleNotFoundError: No module named ‘apt’

Did I miss anything? What are the commands to setup for an offline installation?

Thank you,
David