Vcard unable to load

I am trying to add the vcard libraries in codeigniter 3. But it is giving me the error that "Unable to load the requested class: Vcard".

I have already define the path

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

require_once APPPATH."/libraries/behat/transliterator/src/Behat/Transliterator/Transliterator.php";
require_once APPPATH."/libraries/jeroendesloovere/vcard/src/VCard.php";

And in function it is define like this

public function vcf_export()
    {

            $this->load->library('vcard');
            
            $vcard = new VCard(); 
    }