Fatal error: Uncaught Error: Interface "Symfony\Component\Security\Http\Authentication\AuthenticationSuccessHandlerInterface" not found in /home/ldt/public_html/canvas/udoit/vendor/symfony/security-http/Authentication/CustomAuthenticationSuccessHandler.php:21 Stack trace: #0 {main} thrown in /home/ldt/public_html/canvas/udoit/vendor/symfony/security-http/Authentication/CustomAuthenticationSuccessHandler.php on line 21