Fatal error: Uncaught Error: Class "Symfony\Component\Config\Definition\BaseNode" not found in /home/rcmch/test.m-s-i.ch/vendor/symfony/config/Definition/VariableNode.php:24 Stack trace: #0 {main} thrown in /home/rcmch/test.m-s-i.ch/vendor/symfony/config/Definition/VariableNode.php on line 24