Not having a default browser and pressing on "Web Browser" icon in xfce will give annoying bug

[Patrick]

Also solved by this?

Add pyqt5-dev-tool dependency to kicksecure dependencies

Root cause is that meta package kicksecure-desktop-applications-recommended isn’t installed. That package would ensure that the dependency package repository-dist-wizard gets installed. I’ve updated the installation instructions just now: Here’s the change: Debian: Difference between revisions - Kicksecure