Fatal error: Uncaught Error: Class "Symfony\Component\Security\Core\Authentication\Token\AbstractToken" not found in /home/ldt/public_html/canvas/udoit/vendor/symfony/framework-bundle/Test/TestBrowserToken.php:22 Stack trace: #0 {main} thrown in /home/ldt/public_html/canvas/udoit/vendor/symfony/framework-bundle/Test/TestBrowserToken.php on line 22