https://bugs.kde.org/show_bug.cgi?id=458824
--- Comment #1 from thebluequa...@mailo.com --- I got this error, too, while adding some rule without using the application list. However, restart plasma firewall seems to have fixed the issue for me. OS: KDE Neon User (based on Ubuntu 22.04 LTS, Jammy Jellyfish) Plasma Version: 5.26.2 Kernel: 5.15.0-52 generic 64bit UFW version: 0.36.1-4build1 -- You are receiving this mail because: You are watching all bug changes.