Fatal error: Uncaught Error: Class 'Box\Spout\Writer\Common\Manager\WorkbookManagerAbstract' not found in /var/www/html/portal/vendor/box/spout/src/Spout/Writer/XLSX/Manager/WorkbookManager.php:14 Stack trace: #0 {main} thrown in /var/www/html/portal/vendor/box/spout/src/Spout/Writer/XLSX/Manager/WorkbookManager.php on line 14