Fatal error: Uncaught Error: Class "TCPDF" not found in /var/www/qr-ch.lotzapp.work/example/TcPdfOutput/tcpdf-example.php:13 Stack trace: #0 {main} thrown in /var/www/qr-ch.lotzapp.work/example/TcPdfOutput/tcpdf-example.php on line 13