Fatal error: Uncaught Error: Class "Symfony\Component\Security\Core\Exception\RuntimeException" not found in /home/ldt/public_html/canvas/udoit/vendor/symfony/security-core/Exception/AuthenticationException.php:24 Stack trace: #0 {main} thrown in /home/ldt/public_html/canvas/udoit/vendor/symfony/security-core/Exception/AuthenticationException.php on line 24