Fatal error: Uncaught Error: Class 'FPDF' not found in C:\Apache24\htdocs\PortalUIS_bkp\libs\PDFMerge\fpdi\fpdi_bridge.php:23 Stack trace: #0 C:\Apache24\htdocs\PortalUIS_bkp\libs\PDFMerge\fpdi\fpdf_tpl.php(12): require_once() #1 C:\Apache24\htdocs\PortalUIS_bkp\libs\PDFMerge\fpdi\fpdi.php(12): require_once('C:\\Apache24\\htd...') #2 {main} thrown in C:\Apache24\htdocs\PortalUIS_bkp\libs\PDFMerge\fpdi\fpdi_bridge.php on line 23