Snap is a cross-platform packaging and deployment system developed by Canonical, the maker of Ubuntu, for the Linux platform. It’s compatible with most major Linux distros, including Ubuntu, Debian, Arch Linux, Fedora, CentOS, and Manjaro.

Snap Store, formerly known as Ubuntu Software Center or Ubuntu Software, is a graphical package management tool and software storefront for Ubuntu and other Linux distributions that support Snap packages. It allows users to browse, install, and manage software packages, including both traditional deb packages and newer Snap packages.

Snap package is a self-contained software bundle that includes all dependencies needed to run the application, making them easy to install and manage across different Linux distributions.

Problem description

Application update shows an error dialog with the text: Unable to update …

Solution

Open Terminal and type:

killall snap-store

snap refresh