Fatal error: Uncaught Error: Class "Symfony\Component\CssSelector\Node\AbstractNode" not found in C:\Servers\htdocs\inventory.fitzalan.co.uk\vendor\symfony\css-selector\Node\CombinedSelectorNode.php:24 Stack trace: #0 {main} thrown in C:\Servers\htdocs\inventory.fitzalan.co.uk\vendor\symfony\css-selector\Node\CombinedSelectorNode.php on line 24