Fatal error: Uncaught Error: Class "FPDF" not found in C:\OpenServer2\domains\cubbo\app\assets\php\PDF\setasign\fpdi\src\FpdfTpl.php:18 Stack trace: #0 {main} thrown in C:\OpenServer2\domains\cubbo\app\assets\php\PDF\setasign\fpdi\src\FpdfTpl.php on line 18