Fatal error: Uncaught Error: Class 'PhpOffice\PhpSpreadsheet\DefinedName' not found in D:\xampp\htdocs\psp\backend\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\NamedFormula.php:7
Stack trace:
#0 {main}
thrown in D:\xampp\htdocs\psp\backend\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\NamedFormula.php on line 7