Fatal error: Uncaught Error: Undefined constant "PHPEXCEL_ROOT" in /home/revofinancial/public_html/thirdparty/excel/Classes/PHPExcel/Shared/trend/exponentialBestFitClass.php:29
Stack trace:
#0 {main}
thrown in /home/revofinancial/public_html/thirdparty/excel/Classes/PHPExcel/Shared/trend/exponentialBestFitClass.php on line 29