Fatal error: Uncaught Error: Class 'chillerlan\QRCode\Common\LuminanceSourceAbstract' not found in C:\xampp\htdocs\vendor\chillerlan\php-qrcode\src\Common\GDLuminanceSource.php:26 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vendor\chillerlan\php-qrcode\src\Common\GDLuminanceSource.php on line 26