Не могу сменить тему оформления.
При переходе по пункту: "Внешний вид" -> "Оформление приложений", вылетает.
KDE: Plasma 5.26.2
Application: Параметры системы (systemsettings), signal: Aborted

[KCrash Handler]
#4  0x00007f26032a464c in  () at /usr/lib/libc.so.6
#5  0x00007f2603254958 in raise () at /usr/lib/libc.so.6
#6  0x00007f260323e53d in abort () at /usr/lib/libc.so.6
#7  0x00007f26036dbede in qt_assert(char const*, char const*, int) () at /usr/lib/libQt5Core.so.5
#8  0x00007f26036f9b93 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f25e6a87ca4 in  () at /usr/lib/qt/plugins/styles/libqgtk2style.so
#10 0x00007f26044bf634 in QStyleFactory::create(QString const&) () at /usr/lib/libQt5Widgets.so.5
#11 0x00007f25e7096e39 in  () at /usr/lib/qt/plugins/plasma/kcms/systemsettings/kcm_style.so
#12 0x00007f26017d7691 in QQmlObjectCreator::finalize(QQmlInstantiationInterrupt&) () at /usr/lib/libQt5Qml.so.5
#13 0x00007f260177dbef in QQmlIncubatorPrivate::incubate(QQmlInstantiationInterrupt&) () at /usr/lib/libQt5Qml.so.5
#14 0x00007f260177e596 in QQmlEnginePrivate::incubate(QQmlIncubator&, QQmlContextData*) () at /usr/lib/libQt5Qml.so.5
#15 0x00007f25feab7896 in  () at /usr/lib/libQt5QmlModels.so.5
#16 0x00007f2601c2de69 in  () at /usr/lib/libQt5Quick.so.5
#17 0x00007f2601c1c402 in  () at /usr/lib/libQt5Quick.so.5
#18 0x00007f2601c2d6ca in  () at /usr/lib/libQt5Quick.so.5
#19 0x00007f2601c2fa23 in  () at /usr/lib/libQt5Quick.so.5
#20 0x00007f2601b7e35a in QQuickWindowPrivate::polishItems() () at /usr/lib/libQt5Quick.so.5
#21 0x00007f2601c0fef4 in QQuickRenderControl::polishItems() () at /usr/lib/libQt5Quick.so.5
#22 0x00007f2601eb9ec8 in  () at /usr/lib/libQt5QuickWidgets.so.5
#23 0x00007f2601ebb61f in QQuickWidget::timerEvent(QTimerEvent*) () at /usr/lib/libQt5QuickWidgets.so.5
#24 0x00007f26038ecb86 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#25 0x00007f2604450b1c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#26 0x00007f26038c8f98 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#27 0x00007f2603913493 in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#28 0x00007f2603913ad2 in  () at /usr/lib/libQt5Core.so.5
#29 0x00007f2601f1a87b in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#30 0x00007f2601f71279 in  () at /usr/lib/libglib-2.0.so.0
#31 0x00007f2601f19132 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#32 0x00007f2603913c4c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#33 0x00007f26038c173c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#34 0x00007f26038cc269 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#35 0x0000564579f4bc03 in  ()
#36 0x00007f260323f290 in  () at /usr/lib/libc.so.6
#37 0x00007f260323f34a in __libc_start_main () at /usr/lib/libc.so.6
#38 0x0000564579f4c565 in  ()
[Inferior 1 (process 1409997) detached]
UPD: Думаю из-за этого, как это решить?
~ » systemsettings
file:///usr/lib/qt/qml/org/kde/kirigami.2/ScrollablePage.qml:203:9: QML MouseArea: Binding loop detected for property "width"
file:///usr/lib/qt/qml/org/kde/kirigami.2/ScrollablePage.qml:203:9: QML MouseArea: Binding loop detected for property "width"
QQmlEngine::setContextForObject(): Object already has a QQmlContext
file:///usr/share/kpackage/kcms/kcm_landingpage/contents/ui/main.qml:212:13: Unable to assign [undefined] to QQuickItem*
QQmlEngine::setContextForObject(): Object already has a QQmlContext
file:///usr/share/kpackage/kcms/kcm_lookandfeel/contents/ui/main.qml:84:9: QML StackView: Binding loop detected for property "implicitHeight"
file:///usr/lib/qt/qml/org/kde/kirigami.2/PlaceholderMessage.qml:239:5: QML Heading: Binding loop detected for property "verticalAlignment"
qml: The item SubCategoryPage_QMLTYPE_112(0x563151b61290) is already in the PageRow
QQmlEngine::setContextForObject(): Object already has a QQmlContext
file:///usr/lib/qt/qml/org/kde/kirigami.2/PlaceholderMessage.qml:239:5: QML Heading: Binding loop detected for property "verticalAlignment"
file:///usr/share/kpackage/kcms/kcm_style/contents/ui/main.qml:38:13: QML ColumnLayout: Cannot anchor to an item that isn't a parent or sibling.
qml: The item SubCategoryPage_QMLTYPE_112(0x563151b61290) is already in the PageRow
Cannot mix incompatible Qt library (5.15.3) with this library (5.15.7)
28 -- exe=/usr/bin/systemsettings
13 -- platform=xcb
11 -- display=:0
23 -- appname=systemsettings
17 -- apppath=/usr/bin
9 -- signal=6
10 -- pid=10988
18 -- appversion=5.26.2
46 -- programname=Параметры системы
31 -- [email protected]
12 -- startupid=0
KCrash: crashing... crashRecursionCounter = 2
KCrash: Application Name = systemsettings path = /usr/bin pid = 10988
KCrash: Arguments: /usr/bin/systemsettings
KCrash: Attempting to start /usr/lib/drkonqi
[1]  + 10988 suspended (signal)  systemsettings
------------------------------------------------------------------------------------------------------------------------------------------------------------------------
~ » QSocketNotifier: Invalid socket 5 and type 'Read', disabling...
QSocketNotifier: Invalid socket 21 and type 'Read', disabling...
Unable to start Dr. Konqi
Re-raising signal for core dump handling.

[1]  + 10988 IOT instruction (core dumped)  systemsettings
Проблема была с пакетом qt5gtk2, после удаления проблема ушла!