Thanks for posting output of two commands I have requested. These clearly show that you are using Bionic on x86_64 machine.
As Joe’s script in current form will fail to install Piaware on any distro other than Jessie, please use following manual method:
NOTE:
To avoid typing mistakes, do NOT type these commands. Instead copy-paste from here.
(1) Install dependencies & tools to build
THESE COMMAND LINES ARE LONG, AND SOME PORTION MAY BE HIDDEN
SCROLL RIGHT TO SEE THE HIDDEN PORTION OF THESE COMMANDS
sudo apt-get install -y build-essential debhelper tcl8.6-dev autoconf
sudo apt-get install -y python3-dev python3-venv virtualenv
sudo apt-get install -y dh-systemd zlib1g-dev tclx8.4 tcllib
sudo apt-get install -y tcl-tls itcl3 net-tools devscripts
(2) Clone source code and build .deb package
THESE COMMAND LINES ARE LONG, AND SOME PORTION MAY BE HIDDEN
SCROLL RIGHT TO SEE THE HIDDEN PORTION OF THESE COMMANDS
sudo mkdir ~/build-piaware
cd ~/build-piaware
sudo git clone https://github.com/flightaware/piaware_builder.git
cd piaware_builder
sudo ./sensible-build.sh bionic
cd package-bionic
sudo dpkg-buildpackage -b
cd ../
sudo dpkg -i piaware_*.deb