Notice: Use of undefined constant PHPEXCEL_ROOT - assumed 'PHPEXCEL_ROOT' in /home/zxun/public_html/module7/vendor/phpoffice/phpexcel/Classes/PHPExcel/Shared/trend/polynomialBestFitClass.php on line 3

Warning: require_once(PHPEXCEL_ROOTPHPExcel/Shared/trend/bestFitClass.php): failed to open stream: No such file or directory in /home/zxun/public_html/module7/vendor/phpoffice/phpexcel/Classes/PHPExcel/Shared/trend/polynomialBestFitClass.php on line 3

Fatal error: require_once(): Failed opening required 'PHPEXCEL_ROOTPHPExcel/Shared/trend/bestFitClass.php' (include_path='.:/usr/share/pear7:/usr/share/php7') in /home/zxun/public_html/module7/vendor/phpoffice/phpexcel/Classes/PHPExcel/Shared/trend/polynomialBestFitClass.php on line 3