Fatal error: Uncaught Error: Class 'PHPExcel_Writer_Abstract' not found in /home/app/htdocs/lidia/vendor/phpoffice/phpexcel/Classes/PHPExcel/Writer/Excel5.php:36
Stack trace:
#0 {main}
thrown in /home/app/htdocs/lidia/vendor/phpoffice/phpexcel/Classes/PHPExcel/Writer/Excel5.php on line 36