I have a custom module and in its controller i am using 'namespace + classname' format to included QRCode library (which is in root/vendor/).
I have used composer to install library
Now I am trying to use this library in custom controller
namespace Drupal\product_display\Controller; use Endroid\QrCode\QrCode;
But I am getting 'class not found error'
Error: Class 'Endroid\QrCode\QrCode' not found
Class doesn't autoload.