Install libappstream4 by entering the following commands in the terminal:
sudo apt update sudo apt install libappstream4
Description:
Library to access AppStream services
AppStream is a metadata specification, allowing to write metadata for software projects in a standardized format. This allows software centers to display useful information for not installed software, as well as determining software the user might want to install (e.g. to open an unknown file type or to make missing firmware available). . This package contains a GObject-based library to access AppStream services, like the software component metadata pool. It also contains functions for reading, writing and transforming AppStream metadata.
Homepage: http://www.freedesktop.org/wiki/Distributions/AppStream/
Version: 0.12.0-3
Section: libs