Fatal error: Uncaught Error: Class "setasign\Fpdi\Tcpdf\Fpdi" not found in C:\Apache24\htdocs\cms_upgrade\vendor\setasign\fpdi\src\TcpdfFpdi.php:20 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\setasign\fpdi\src\TcpdfFpdi.php on line 20