Install qml-module-qtquick-virtualkeyboard by entering the following commands in the terminal:
sudo apt update sudo apt install qml-module-qtquick-virtualkeyboard
Description:
Qt virtual keyboard - QML module
The Qt Virtual Keyboard project provides an input framework and reference keyboard frontend for Qt 5 on Linux Desktop/X11, Windows Desktop, and Boot2Qt targets. . This package contains the QML module.
Homepage: http://doc.qt.io/qt-5/qtvirtualkeyboard-index.html
Version: 5.9.5+dfsg-0ubuntu1
Section: universe/libdevel