Fatal error: Uncaught Error: Class "FPDF" not found in /home/awsuser/subdomains/ai.betterquo.com/vendor/konekt/pdf-invoice/src/InvoicePrinter.php:18 Stack trace: #0 /home/awsuser/subdomains/ai.betterquo.com/vendor/konekt/pdf-invoice/examples/change_timezone.php(5): include() #1 {main} thrown in /home/awsuser/subdomains/ai.betterquo.com/vendor/konekt/pdf-invoice/src/InvoicePrinter.php on line 18