Fatal error: Uncaught Error: Interface 'Symfony\Component\Security\Http\Logout\LogoutHandlerInterface' not found in /home/eberhardschwarze/public_html/vendor/friendsofsymfony/http-cache-bundle/src/Security/Http/Logout/ContextInvalidationLogoutHandler.php:20 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/vendor/friendsofsymfony/http-cache-bundle/src/Security/Http/Logout/ContextInvalidationLogoutHandler.php on line 20