Fatal error: Uncaught Error: Class "FPDF" not found in /var/www/erp/spreadsheet/vendor/setasign/fpdi/fpdi_bridge.php:23 Stack trace: #0 /var/www/erp/spreadsheet/vendor/setasign/fpdi/fpdf_tpl.php(12): require_once() #1 /var/www/erp/spreadsheet/vendor/setasign/fpdi/fpdi.php(12): require_once('...') #2 {main} thrown in /var/www/erp/spreadsheet/vendor/setasign/fpdi/fpdi_bridge.php on line 23