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