Fatal error: Uncaught Error: Class "FPDF" not found in /opt/bitnami/apache/htdocs/common/php_lib/TCPDF-main/fpdi/FpdfTpl.php:18 Stack trace: #0 {main} thrown in /opt/bitnami/apache/htdocs/common/php_lib/TCPDF-main/fpdi/FpdfTpl.php on line 18