Fatal error: Uncaught Error: Class "TYPO3\CMS\Core\Utility\ExtensionManagementUtility" not found in /var/www/html/cwtypo3/vendor/web-vision/wv_t3unity/Configuration/TCA/Overrides/sys_template.php:14 Stack trace: #0 /var/www/html/cwtypo3/vendor/web-vision/wv_t3unity/Configuration/TCA/Overrides/sys_template.php(20): {closure}() #1 {main} thrown in /var/www/html/cwtypo3/vendor/web-vision/wv_t3unity/Configuration/TCA/Overrides/sys_template.php on line 14