Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\DefinedName" not found in D:\xampp\htdocs\copia dataflexfiling\assets\phpspreadsheet\NamedRange.php:8 Stack trace: #0 {main} thrown in D:\xampp\htdocs\copia dataflexfiling\assets\phpspreadsheet\NamedRange.php on line 8