Fatal error: Uncaught Error: Interface 'Symfony\Component\Security\Http\Logout\LogoutHandlerInterface' not found in /home/eberhardschwarze/public_html/vendor/nelmio/security-bundle/EventListener/FlexibleSslListener.php:31 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/vendor/nelmio/security-bundle/EventListener/FlexibleSslListener.php on line 31