Fatal error: Uncaught Error: Class "Symfony\Component\Config\Definition\Builder\NodeDefinition" not found in C:\WebServer\core\apache\htdocs\pma\vendor\symfony\config\Definition\Builder\VariableNodeDefinition.php:21 Stack trace: #0 {main} thrown in C:\WebServer\core\apache\htdocs\pma\vendor\symfony\config\Definition\Builder\VariableNodeDefinition.php on line 21