Fatal error: Uncaught Error: Class "Symfony\Component\Form\AbstractExtension" not found in C:\laragon\www\session\vendor\symfony\form\Extension\HtmlSanitizer\HtmlSanitizerExtension.php:22 Stack trace: #0 {main} thrown in C:\laragon\www\session\vendor\symfony\form\Extension\HtmlSanitizer\HtmlSanitizerExtension.php on line 22