Fatal error: Uncaught Error: Class 'Box\Spout\Common\Helper\FileSystemHelper' not found in /var/www/html/portal/vendor/box/spout/src/Spout/Writer/ODS/Helper/FileSystemHelper.php:16 Stack trace: #0 {main} thrown in /var/www/html/portal/vendor/box/spout/src/Spout/Writer/ODS/Helper/FileSystemHelper.php on line 16