What determines QT_PLUGIN_PATH?
If I open a Konsole window and type env it shows mine to be:
Should not /usr/lib/qt5/plugins also be in this path?
I started looking because of the following in journalctl output.
systemsettings5: org.kde.kcoreaddons: Error loading plugin "kcm_lookandfeel" "The shared library was not found." Plugin search paths are ("/usr/lib/kde4/plugins", "/usr/lib/qt/plugins", "/usr/lib/qt5/plugins", "/usr/bin") The environment variable QT_PLUGIN_PATH might be not correctly set