Fatal error: Uncaught Error: Class "TYPO3\CMS\Core\Utility\ExtensionManagementUtility" not found in /var/www/html/cwtypo3/packages/wv_site/ext_localconf.php:31 Stack trace: #0 {main} thrown in /var/www/html/cwtypo3/packages/wv_site/ext_localconf.php on line 31