The four dependences listed in the release thread seem to be installed with a default ubuntu install, but apparently you also need libgconf-2-4 which isn’t.
It would be handy if the release announcement included this line:
sudo apt install libgtk2.0-0 libsoup2.4-1 libarchive13 libpng12 libgconf-2-4
so Ubuntu n00bs like me could just paste it in and go get a coffee.