Fatal error: Uncaught Error: Class "PHPExcel_Writer_Abstract" not found in /home/apolo/public_html/sgdpr/vendor/phpoffice/phpexcel/Classes/PHPExcel/Writer/Excel5.php:28
Stack trace:
#0 {main}
thrown in /home/apolo/public_html/sgdpr/vendor/phpoffice/phpexcel/Classes/PHPExcel/Writer/Excel5.php on line 28