Fatal error: Uncaught Error: Class "chillerlan\QRCode\Output\QROutputAbstract" not found in /home/kardi/public_html/vendor2523/chillerlan/php-qrcode/examples/MyCustomOutput.php:17 Stack trace: #0 {main} thrown in /home/kardi/public_html/vendor2523/chillerlan/php-qrcode/examples/MyCustomOutput.php on line 17