Fatal error: Uncaught Error: Class "TYPO3\CMS\Core\Utility\ExtensionManagementUtility" not found in /var/www/html/cwtypo3/packages/wv_site/ext_tables.php:30 Stack trace: #0 /var/www/html/cwtypo3/packages/wv_site/ext_tables.php(107): {closure}() #1 {main} thrown in /var/www/html/cwtypo3/packages/wv_site/ext_tables.php on line 30