Discover was working and some time recently it began crashing when starting. My current version is 5.13.5 on KDE Neon developer version. --- QQmlComponent: Created graphical object was not placed in the graphics scene. qml: Warning: ToolbarApplicationHeader is deprecated, remove and use the automatic internal toolbar instead. file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/GlobalDrawer.qml:258: TypeError: Cannot read property 'length' of undefined file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/GlobalDrawer.qml:293: TypeError: Cannot read property 'length' of undefined file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/GlobalDrawer.qml:292: TypeError: Cannot read property 'length' of undefined corrupted size vs. prev_size KCrash: crashing... crashRecursionCounter = 2 KCrash: Application Name = plasma-discover path = /usr/bin pid = 1606 KCrash: Arguments: /usr/bin/plasma-discover Alarm clock --- Please let me know if I can be of more help.
*** This bug has been marked as a duplicate of bug 398412 ***