Fatal error: Uncaught Error: Class "Zxing\LuminanceSource" not found in /home/app/htdocs/v2.2.3/vendor/khanamiryan/qrcode-detector-decoder/lib/GDLuminanceSource.php:13 Stack trace: #0 {main} thrown in /home/app/htdocs/v2.2.3/vendor/khanamiryan/qrcode-detector-decoder/lib/GDLuminanceSource.php on line 13