Fatal error: Uncaught Error: Class 'Box\Spout\Writer\Exception\WriterException' not found in /var/www/html/lib/spout-2.7.2/src/Spout/Writer/Exception/SheetNotFoundException.php:11 Stack trace: #0 {main} thrown in /var/www/html/lib/spout-2.7.2/src/Spout/Writer/Exception/SheetNotFoundException.php on line 11