Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Reader\Xls" not found in C:\Apache24\htdocs\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Reader\Xls\ConditionalFormatting.php:12 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Reader\Xls\ConditionalFormatting.php on line 12