There is a typo in the file "Ubuntu18.04-minato-qt-installer.sh"
Currently it is :
if [ `id -u` = 0 }
Should be :
if [ `id -u` = 0 ]
It is currently installing now.
Edit: Installed and it works with a minor error.
Gtk-Message: 14:47:59.771: Failed to load module "canberra-gtk-module"
No systemtrayicon available
So I installed libcanberra-gtk-module and now it has this error:
No systemtrayicon available
Works fine otherwise.