Fatal error: Uncaught Error: Class "PHPCompatibility\AbstractNewFeatureSniff" not found in /var/www/html/upload/PhpSpreadsheet-master/vendor/phpcompatibility/php-compatibility/PHPCompatibility/Sniffs/FunctionUse/NewFunctionsSniff.php:26 Stack trace: #0 {main} thrown in /var/www/html/upload/PhpSpreadsheet-master/vendor/phpcompatibility/php-compatibility/PHPCompatibility/Sniffs/FunctionUse/NewFunctionsSniff.php on line 26