Install libsfml-network2.4 by entering the following commands in the terminal:
sudo apt update sudo apt install libsfml-network2.4
Description:
Simple and Fast Multimedia Library - Network part
SFML is a modern multimedia library offering a wide range of subsystems useful to produce a multimedia app. It offers OpenGL integration for Hardware accelerated Graphics, Windowing and Input support, Audio and Network facilities and supports GNU/Linux, MS Windows and Mac OS X. . The Network Library brings basic networking support as needed by games.
Homepage: http://www.sfml-dev.org/
Version: 2.4.2+dfsg-4
Section: universe/libs