Fatal error: Uncaught Error: Class 'setasign\Fpdi\Tcpdf\Fpdi' not found in C:\xampp\htdocs\admin\vendor\setasign\fpdi\src\TcpdfFpdi.php:20 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\setasign\fpdi\src\TcpdfFpdi.php on line 20