Fatal error: Uncaught Error: Class 'Maatwebsite\Excel\Events\Event' not found in /var/www/html/fuel/vendor/maatwebsite/excel/src/Events/BeforeSheet.php:7 Stack trace: #0 {main} thrown in /var/www/html/fuel/vendor/maatwebsite/excel/src/Events/BeforeSheet.php on line 7