Fatal error: Uncaught Error: Class 'FPDF' not found in /home/app/htdocs/ninja/vendor/setasign/fpdi/fpdi_bridge.php:23
Stack trace:
#0 /home/app/htdocs/ninja/vendor/setasign/fpdi/fpdf_tpl.php(12): require_once()
#1 {main}
thrown in /home/app/htdocs/ninja/vendor/setasign/fpdi/fpdi_bridge.php on line 23