Fatal error: Uncaught Error: Class 'PHPExcel_Writer_Excel2007_WriterPart' not found in C:\Apache24\htdocs\afnic\vendor\PHPExcel\Writer\OpenDocument\WriterPart.php:28 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\afnic\vendor\PHPExcel\Writer\OpenDocument\WriterPart.php on line 28