SOLVED

I've use the PUBLIC_ACCESS to make the login and register page accesable without login. This in working now

    access_control:
        - { path: ^/login, roles: PUBLIC_ACCESS }
        - { path: ^/logout, roles: PUBLIC_ACCESS }
        - { path: ^/register, roles: PUBLIC_ACCESS }

        - { path: ^/, roles: IS_AUTHENTICATED_FULLY }