Fatal error: Uncaught Error: Undefined constant "PHPEXCEL_ROOT" in /home/apolo/public_html/qua_sgdpr/vendor/phpoffice/phpexcel/Classes/PHPExcel/Shared/trend/logarithmicBestFitClass.php:3 Stack trace: #0 {main} thrown in /home/apolo/public_html/qua_sgdpr/vendor/phpoffice/phpexcel/Classes/PHPExcel/Shared/trend/logarithmicBestFitClass.php on line 3