how to load qr library

Hi, that one are tailored for CodeIgniter 3, and will not work outside the box. There are no need to search for specifics packages anymore for CodeIgniter, just use a generic one that can be installed and used with Composer.

Like this one: https://github.com/endroid/qr-code

PS. I deleted all your x-large text, no one likes that. It's just irritating.