Fatal error: Uncaught Error: Class 'Symfony\Component\CssSelector\Node\AbstractNode' not found in /home/app/htdocs/message_gateway/vendor/symfony/css-selector/Node/NegationNode.php:24
Stack trace:
#0 {main}
thrown in /home/app/htdocs/message_gateway/vendor/symfony/css-selector/Node/NegationNode.php on line 24