Fatal error: Uncaught Error: Class "Box\Spout\Writer\Common\Manager\WorkbookManagerAbstract" not found in /home2/cp334332/public_html/examcenter/vendor/box/spout/src/Spout/Writer/XLSX/Manager/WorkbookManager.php:14 Stack trace: #0 {main} thrown in /home2/cp334332/public_html/examcenter/vendor/box/spout/src/Spout/Writer/XLSX/Manager/WorkbookManager.php on line 14