Fatal error: Uncaught Error: Class "setasign\Fpdi\PdfParser\CrossReference\AbstractReader" not found in D:\xampp\htdocs\express\vendor\setasign\fpdi\src\PdfParser\CrossReference\FixedReader.php:22 Stack trace: #0 {main} thrown in D:\xampp\htdocs\express\vendor\setasign\fpdi\src\PdfParser\CrossReference\FixedReader.php on line 22