Can't load pdf with using Mpdf in Codeigniter 4

having a quick look

your using

Code:

$classmap = [
            'MPDF' => APPPATH .'Libraries/mpdf.php'
];

so if my coffee has kicked in you should not  be using php require stuff

what you will need somewhere is something  like

Code:

use \namespace\mPDF;

where did you get mPDF from ?

I'm get mpdf in my controller , this is my code 

use MPDF