Fatal error: Uncaught Error: Interface 'Symfony\Component\Config\Definition\Builder\NodeParentInterface' not found in /home/www/public_html/admin/shared/codeigniter/vendor/symfony/config/Definition/Builder/NodeDefinition.php:22 Stack trace: #0 {main} thrown in /home/www/public_html/admin/shared/codeigniter/vendor/symfony/config/Definition/Builder/NodeDefinition.php on line 22