Fatal error: Uncaught Error: Class "PHPCompatibility\Sniffs\Lists\NewKeyedListSniff" not found in /var/www/html/upload/PhpSpreadsheet-master/vendor/phpcompatibility/php-compatibility/PHPCompatibility/Sniffs/Lists/NewListReferenceAssignmentSniff.php:27 Stack trace: #0 {main} thrown in /var/www/html/upload/PhpSpreadsheet-master/vendor/phpcompatibility/php-compatibility/PHPCompatibility/Sniffs/Lists/NewListReferenceAssignmentSniff.php on line 27