Fatal error: Uncaught Error: Class "Symfony\Component\CssSelector\Node\AbstractNode" not found in /home/bimmertest/BookStack/vendor/symfony/css-selector/Node/PseudoNode.php:24 Stack trace: #0 {main} thrown in /home/bimmertest/BookStack/vendor/symfony/css-selector/Node/PseudoNode.php on line 24