SUMMARY "The shared library not found" message in window decoration module in system settings. STEPS TO REPRODUCE 1. Open System Settings 2. Go to Application style - window decoration OBSERVED RESULT Cannot access Window Decorations module: "The shared library not found" Output from terminal: kcmshell5 kwindecoration org.kde.kcoreaddons: Error loading plugin "kcm_kwindecoration" "The shared library was not found." Plugin search paths are ("/usr/lib/x86_64-linux-gnu/qt5/plugins", "/usr/bin") The environment variable QT_PLUGIN_PATH might be not correctly set Error loading plugin: "The shared library was not found." SOFTWARE/OS VERSIONS Operating System: KDE neon Developer Edition KDE Plasma Version: 5.15.80 KDE Frameworks Version: 5.56.0 Qt Version: 5.12.0 Kernel Version: 4.18.0-16-generic OS Type: 64-bit