Fatal error: Uncaught Error: Class "PHPExcel_Writer_Excel2007_WriterPart" not found in D:\laragon\laragon\www\old\promocion2\plugins\PHPExcel\Writer\Excel2007\StringTable.php:36 Stack trace: #0 {main} thrown in D:\laragon\laragon\www\old\promocion2\plugins\PHPExcel\Writer\Excel2007\StringTable.php on line 36