Thanks for the quick response!
To set up the instance, I created an Ubuntu 16.04 instance in AWS and did the following in it:
sudo apt-get update
sudo apt install python3-pip python3.5-dev unzip make libsodium18
chmod +x setup-charm.sh
pip3 install -U --no-cache-dir sovrin-client
sudo -H pip3 install virtualenvwrapper
echo '' >> ~/.bashrc
echo '# Python virtual environment wrapper' >> ~/.bashrc
echo 'export VIRTUALENVWRAPPER_PYTHON=/usr/bin/python3' >> ~/.bashrc
echo 'export WORKON_HOME=$HOME/.virtualenvs' >> ~/.bashrc
echo 'source /usr/local/bin/virtualenvwrapper.sh' >> ~/.bashrc
mv pool_transactions_sandbox .sovrin/
After that, I get the same output as I wrote previously... though I can paste the whole session if you like.
I appreciate the quick response because I'm trying to get a proof-of-concept done by tomorrow, so I'd love to show a good result.
Thanks again for any help.
PS: I also appreciate the pointer to Vagrant instructions, since I failed on that route as well (as you can see from the other issue I logged today): it may have to do with the "pubkey", so I'll try again.