Fatal error: Uncaught Error: Class 'chillerlan\Settings\SettingsContainerAbstract' not found in C:\xampp\htdocs\vendor\chillerlan\php-qrcode\src\QROptions.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vendor\chillerlan\php-qrcode\src\QROptions.php on line 18