Fatal error: Uncaught Error: Class 'Symfony\Component\Config\Definition\Builder\NodeDefinition' not found in C:\Apache24\htdocs\fixedasset\vendor\symfony\config\Definition\Builder\ArrayNodeDefinition.php:23 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\fixedasset\vendor\symfony\config\Definition\Builder\ArrayNodeDefinition.php on line 23