/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Components/Popups/1.3/ is in qml-module-ubuntu-components 1.3.1918+16.04.20160404-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Components/Popups/1.3/ActionSelectionPopover.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Components/Popups/1.3/ComposerSheet.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Components/Popups/1.3/DefaultSheet.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Components/Popups/1.3/Dialog.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Components/Popups/1.3/Popover.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Components/Popups/1.3/PopupBase.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Components/Popups/1.3/SheetBase.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Components/Popups/1.3/internalPopupUtils.js
/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Components/Popups/1.3/popupUtils.js