Install libqxt-gui0 by entering the following commands in the terminal:
sudo apt update sudo apt install libqxt-gui0
Description:
extensions to Qt GUI classes (LibQxt)
LibQxt is an extension library for the Qt application framework. LibQxt provides a suite of cross-platform utility classes to add functionality not readily available in Qt. . The QxtGui module extends QxtCore and QtGui modules.
Homepage: https://bitbucket.org/libqxt/libqxt/wiki/Home
Version: 0.6.2-3
Section: universe/libs