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