Fatal error: Uncaught Error: Class 'FPDF' not found in C:\Apache24\htdocs\PortalUIS_bkp\libs\PDFMerge\fpdi\fpdf_tpl_.php:20 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\PortalUIS_bkp\libs\PDFMerge\fpdi\fpdf_tpl_.php on line 20