this error comes - Fatal error: Uncaught Error: Class "Mpdf\Mpdf" not found in C:\xampp\htdocs\Project1\createPDF.php:23 Stack trace: #0 {main} thrown in C:\xampp\htdocs\Project1\createPDF.php on line 23

when i click on submit button for a form data , to create a pdf file. Please someone tell me what the exact problem is, even i required this also -

require_once __DIR__ . '/vendor/autoload.php';