Fatal error: Uncaught Error: Class 'Box\Spout\Common\Helper\FileSystemHelper' not found in /var/www/html/portal/vendor/box/spout/src/Spout/Writer/XLSX/Helper/FileSystemHelper.php:15
Stack trace:
#0 {main}
thrown in /var/www/html/portal/vendor/box/spout/src/Spout/Writer/XLSX/Helper/FileSystemHelper.php on line 15