Install libqt5widgets5 by entering the following commands in the terminal:
sudo apt update sudo apt install libqt5widgets5
Description:
Qt 5 widgets module
Qt is a cross-platform C++ application framework. Qt's primary feature is its rich set of widgets that provide standard GUI functionality. . The QtWidgets module extends QtGui with C++ widget functionality.
Homepage: http://qt-project.org/
Version: 5.9.5+dfsg-0ubuntu1
Section: libs