Whenever sddm is used (e.g. after startup or when a session closes)
the syslog is filled with the following messages (I did not check for
slight variations, but if you need them I'll do):

Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/Main.qml:420: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/workspace/components/BatteryIcon.qml:42: TypeError: Cannot call method 'roundToIconSize' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/Battery.qml:27: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/Main.qml:158: TypeError: Cannot read property 'gridUnit' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:102: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:39: TypeError: Cannot read property 'gridUnit' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:55: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:41: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:42: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:102: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:39: TypeError: Cannot read property 'gridUnit' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:55: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:41: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:42: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:102: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:39: TypeError: Cannot read property 'gridUnit' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:55: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:41: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:42: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:102: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:39: TypeError: Cannot read property 'gridUnit' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:55: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:41: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:42: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/Login.qml:120: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/Login.qml:115: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components/TextField.qml:121: TypeError: Cannot read property 'iconSizes' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components/TextField.qml:97: TypeError: Cannot read property 'iconSizes' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components/TextField.qml:121: TypeError: Cannot read property 'iconSizes' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components/TextField.qml:97: TypeError: Cannot read property 'iconSizes' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/SessionManagementScreen.qml:84: TypeError: Cannot read property 'gridUnit' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/SessionManagementScreen.qml:114: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/SessionManagementScreen.qml:100: TypeError: Cannot read property 'gridUnit' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/SessionManagementScreen.qml:101: TypeError: Cannot read property 'gridUnit' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/SessionManagementScreen.qml:91: TypeError: Cannot read property 'gridUnit' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserList.qml:25: TypeError: Cannot read property 'gridUnit' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserList.qml:26: TypeError: Cannot read property 'gridUnit' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:51: TypeError: Cannot read property 'iconSizes' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:114: TypeError: Cannot read property 'iconSizes' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:49: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:51: TypeError: Cannot read property 'iconSizes' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:114: TypeError: Cannot read property 'iconSizes' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:49: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:51: TypeError: Cannot read property 'iconSizes' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:114: TypeError: Cannot read property 'iconSizes' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Plasma/ToolButtonStyle.qml:49: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Plasma/ButtonStyle.qml:96: TypeError: Cannot read property 'iconSizes' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Plasma/ButtonStyle.qml:41: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Plasma/TextFieldStyle.qml:90: TypeError: Cannot read property 'iconSizes' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Plasma/TextFieldStyle.qml:90: TypeError: Cannot read property 'iconSizes' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:103: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:44: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:78: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:69: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:95: TypeError: Cannot read property 'gridUnit' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:103: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:44: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:69: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:95: TypeError: Cannot read property 'gridUnit' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:75: TypeError: Cannot read property 'longDuration' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:50: TypeError: Cannot read property 'longDuration' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:103: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:44: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:78: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:69: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:95: TypeError: Cannot read property 'gridUnit' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:103: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:44: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:78: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:69: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:95: TypeError: Cannot read property 'gridUnit' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:103: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:44: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:78: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:69: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:95: TypeError: Cannot read property 'gridUnit' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:103: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:44: TypeError: Cannot read property 'smallSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:78: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:69: TypeError: Cannot read property 'largeSpacing' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/components/UserDelegate.qml:95: TypeError: Cannot read property 'gridUnit' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components/TextField.qml:127: TypeError: Cannot read property 'longDuration' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Plasma/private/TextFieldFocus.qml:93: TypeError: Cannot read property 'longDuration' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components/TextField.qml:127: TypeError: Cannot read property 'longDuration' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components/TextField.qml:103: TypeError: Cannot read property 'longDuration' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/Main.qml:239: TypeError: Cannot read property 'longDuration' of null
Sep 27 18:54:28 samd sddm-greeter[1923]: file:///usr/share/sddm/themes/debian-theme/Main.qml:425: TypeError: Cannot read property 'longDuration' of null

If they are harmless, they should be supressed or a logcheck filter
installed.

Hello,
now with 0.19.0-2 the strings changed:
Dec 27 22:30:00 samd sddm-greeter[879122]: <input>:406:376: Could not add child element to parent element because the types are incorrect.
Dec 27 22:30:00 samd sddm-greeter[879122]: <input>:407:130: Could not add child element to parent element because the types are incorrect.
Dec 27 22:30:00 samd sddm-greeter[879122]: <input>:408:130: Could not add child element to parent element because the types are incorrect.
Dec 27 22:30:00 samd sddm-greeter[879122]: <input>:408:393: Could not add child element to parent element because the types are incorrect.
Dec 27 22:30:00 samd sddm-greeter[879122]: <input>:409:130: Could not add child element to parent element because the types are incorrect.
Dec 27 22:30:00 samd sddm-greeter[879122]: <input>:410:129: Could not add child element to parent element because the types are incorrect.
Dec 27 22:30:00 samd sddm-greeter[879122]: <input>:411:129: Could not add child element to parent element because the types are incorrect.
Dec 27 22:30:00 samd sddm-greeter[879122]: <input>:412:129: Could not add child element to parent element because the types are incorrect.
Dec 27 22:30:00 samd sddm-greeter[879122]: <input>:413:129: Could not add child element to parent element because the types are incorrect.
Dec 27 22:30:00 samd sddm-greeter[879122]: <input>:413:379: Could not add child element to parent element because the types are incorrect.
Dec 27 22:30:00 samd sddm-greeter[879122]: <input>:413:631: Could not add child element to parent element because the types are incorrect.
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/Main.qml:455: TypeError: Cannot read property 'largeSpacing' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/Main.qml:460: TypeError: Cannot read property 'gridUnit' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/Main.qml:162: TypeError: Cannot read property 'gridUnit' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/TextField.qml:42: TypeError: Cannot read property 'gridUnit' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/TextField.qml:146: TypeError: Cannot read property 'iconSizes' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/TextField.qml:122: TypeError: Cannot read property 'iconSizes' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/mobiletextselection/MobileCursor.qml:45: TypeError: Cannot read property 'gridUnit' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/mobiletextselection/MobileCursor.qml:32: TypeError: Cannot read property 'gridUnit' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/mobiletextselection/MobileCursor.qml:23: TypeError: Cannot read property 'devicePixelRatio' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/mobiletextselection/MobileCursor.qml:14: TypeError: Cannot read property 'gridUnit' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/TextField.qml:38: TypeError: Cannot read property 'gridUnit' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/TextField.qml:146: TypeError: Cannot read property 'iconSizes' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/TextField.qml:122: TypeError: Cannot read property 'iconSizes' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/mobiletextselection/MobileCursor.qml:45: TypeError: Cannot read property 'gridUnit' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/mobiletextselection/MobileCursor.qml:32: TypeError: Cannot read property 'gridUnit' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/mobiletextselection/MobileCursor.qml:23: TypeError: Cannot read property 'devicePixelRatio' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/mobiletextselection/MobileCursor.qml:14: TypeError: Cannot read property 'gridUnit' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/TextField.qml:38: TypeError: Cannot read property 'gridUnit' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/TextField.qml:42: TypeError: Cannot read property 'gridUnit' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/components/SessionManagementScreen.qml:85: TypeError: Cannot read property 'gridUnit' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/components/SessionManagementScreen.qml:115: TypeError: Cannot read property 'largeSpacing' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/components/SessionManagementScreen.qml:102: TypeError: Cannot read property 'gridUnit' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/components/SessionManagementScreen.qml:92: TypeError: Cannot read property 'gridUnit' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/components/UserList.qml:27: TypeError: Cannot read property 'gridUnit' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/TextField.qml:152: TypeError: Cannot read property 'longDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/private/TextFieldFocus.qml:80: TypeError: Cannot read property 'longDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/TextField.qml:128: TypeError: Cannot read property 'longDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/TextField.qml:128: TypeError: Cannot read property 'longDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components.3/TextField.qml:152: TypeError: Cannot read property 'longDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:47: TypeError: Cannot read property 'longDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:62: TypeError: Cannot read property 'longDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:78: TypeError: Cannot read property 'shortDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:47: TypeError: Cannot read property 'longDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:62: TypeError: Cannot read property 'longDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:78: TypeError: Cannot read property 'shortDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:47: TypeError: Cannot read property 'longDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:62: TypeError: Cannot read property 'longDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:78: TypeError: Cannot read property 'shortDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:47: TypeError: Cannot read property 'longDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:62: TypeError: Cannot read property 'longDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/components/ActionButton.qml:78: TypeError: Cannot read property 'shortDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/Main.qml:443: TypeError: Cannot read property 'longDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/Main.qml:464: TypeError: Cannot read property 'longDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/Main.qml:249: TypeError: Cannot read property 'longDuration' of null
Dec 27 22:30:07 samd sddm-greeter[879122]: file:///usr/share/sddm/themes/debian-theme/Main.qml:482: TypeError: Cannot read property 'longDuration' of null

If these are harmless, I suggest shipping appropriate logcheck rules.

Greetings

          Helge

Hi

Interesting, I don't see any of those in my journallog ...

My debian-theme points to (via /etc/alternatives) to
/usr/share/sddm/themes/debian-breeze

Which theme are you using? Maybe there is something badly set up?

Best

Norbert

Hello Norbert,

lrwxrwxrwx 1 root root  29 26. Mär 2017 /etc/alternatives/sddm-debian-theme -> /usr/share/sddm/themes/breeze

I did not configure anything in the system, at least none to my
knowledge. (Except of course using the UI).

Greetings

           Helge

Hi Helge,

Hmm, that is indeed from plasma-workspace, and should not be broken.
I will try and see what is going on.

Best

Norbert