Install gir1.2-ubuntu-app-launch-3 by entering the following commands in the terminal:
sudo apt update sudo apt install gir1.2-ubuntu-app-launch-3
Description:
typelib file for libubuntu-app-launch4
Interface for starting apps and getting info on them. . This package can be used by other packages using the GIRepository format to generate dynamic bindings for libubuntu-app-launch4.
Homepage: http://launchpad.net/ubuntu-app-launch
Version: 0.12+17.04.20170404.2-0ubuntu6
Section: universe/libs