Fatal error: Uncaught Error: Class "chillerlan\QRCode\Data\QRDataModeAbstract" not found in C:\xampp\htdocs\bilipoa\vendor\chillerlan\php-qrcode\src\Data\ECI.php:23 Stack trace: #0 {main} thrown in C:\xampp\htdocs\bilipoa\vendor\chillerlan\php-qrcode\src\Data\ECI.php on line 23