@pemek: You mention that you’re seeing the error above in your logs. Would you mind please running the following command on your device and pasting the output here?
cat -n /usr/lib64/qt5/qml/Sailfish/Lipstick/LauncherIcon.qml | sed -n -e 20,40p
I tried to follow this up, but the error is showing on line 30 of the LauncherIcon.qml file, which with the default installation only has 29 lines. So it would be good to know what’s happening in this file on your device, in case it sheds some light on what’s going wrong.