The KeePassX upstream project hasn't been updated since October 2016. A community fork called KeePassXC was started from the latest source code and now includes new features and bug fixes, and the maintainers are very active and responsive. I recommend to install that snap instead. -- elopio
KeePassX is an application for people with extremely high demands on secure
personal data management. It has a light interface, is cross platform and
published under the terms of the GNU General Public License.