Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Reader\Xml\Style\StyleBase" not found in E:\www\xmvc\v5.0\composer\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Reader\Xml\Style\Font.php:8 Stack trace: #0 {main} thrown in E:\www\xmvc\v5.0\composer\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Reader\Xml\Style\Font.php on line 8