Fatal error: Uncaught Error: Class "PHP_CodeSniffer\Sniffs\AbstractScopeSniff" not found in /var/www/html/upload/PhpSpreadsheet-master/vendor/squizlabs/php_codesniffer/src/Standards/MySource/Sniffs/Channels/IncludeSystemSniff.php:18 Stack trace: #0 {main} thrown in /var/www/html/upload/PhpSpreadsheet-master/vendor/squizlabs/php_codesniffer/src/Standards/MySource/Sniffs/Channels/IncludeSystemSniff.php on line 18