Fatal error: Uncaught Error: Class 'chillerlan\QRCode\Data\QRDataModeAbstract' not found in C:\xampp\htdocs\vendor\chillerlan\php-qrcode\src\Data\AlphaNum.php:22 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vendor\chillerlan\php-qrcode\src\Data\AlphaNum.php on line 22