Fatal error: Uncaught Error: Class "Symfony\Component\VarDumper\Dumper\HtmlDumper" not found in /var/www/html/cwtypo3/vendor/typo3/cms-adminpanel/Classes/Utility/HtmlDumper.php:29 Stack trace: #0 {main} thrown in /var/www/html/cwtypo3/vendor/typo3/cms-adminpanel/Classes/Utility/HtmlDumper.php on line 29