Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Reader\Xls" not found in C:\Dropbox\Websites\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Reader\Xls\ListFunctions.php:11 Stack trace: #0 {main} thrown in C:\Dropbox\Websites\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Reader\Xls\ListFunctions.php on line 11