Fatal error: Uncaught Error: Interface "PhpCsFixer\Fixer\FixerInterface" not found in /var/www/html/upload/PhpSpreadsheet-master/vendor/friendsofphp/php-cs-fixer/src/AbstractFixer.php:28 Stack trace: #0 {main} thrown in /var/www/html/upload/PhpSpreadsheet-master/vendor/friendsofphp/php-cs-fixer/src/AbstractFixer.php on line 28