Install libqrencode3 by entering the following commands in the terminal:
sudo apt update sudo apt install libqrencode3
QR Code encoding library
Libqrencode is a library for encoding data in a QR Code symbol, a kind of 2D symbology that can be scanned by handy terminals such as a mobile phone with CCD. The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness. . Libqrencode supports QR Code model 2, described in JIS (Japanese Industrial Standards) X0510:2004 or ISO/IEC 18004. . This package contains runtime libraries of libqrencode.