Bonjour,
je suis nouveau sur symfony 2 et après avoir créer mon projet et générer un admin avec sonataAdminBundle, sonataUserBundle et fosUserBundle je suis bloqué devant une exception :
quand je clique sur le lien pour voir la liste des utilisateurs je tombe sur :

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 An exception has been thrown during the rendering of a template ("Unable to generate a URL for the named route "admin_sonata_user_basegroup_create" as such route does not exist.") in SonataAdminBundle:Core:add_block.html.twig at line 52.
500 Internal Server Error - Twig_Error_Runtime
1 linked Exception:
 
    RouteNotFoundException »
voilà mon fichier config.yml

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imports:
    - { resource: parameters.yml }
    - { resource: security.yml }
    - { resource: services.yml }
    - { resource: @GreenHouseHomeBundle/Resources/config/admin.yml }
 
framework:
    #esi:             ~
    translator:      { fallbacks: ["%locale%"] }
    secret:          "%secret%"
    router:
        resource: "%kernel.root_dir%/config/routing.yml"
        strict_requirements: ~
    form:            ~
    csrf_protection: ~
    validation:      { enable_annotations: true }
    templating:
        engines: ['twig']
        #assets_version: SomeVersionScheme
    default_locale:  "%locale%"
    trusted_hosts:   ~
    trusted_proxies: ~
    session:
        # handler_id set to null will use default session handler from php.ini
        handler_id:  ~
    fragments:       ~
    http_method_override: true
 
# Twig Configuration
twig:
    debug:            "%kernel.debug%"
    strict_variables: "%kernel.debug%"
 
# Assetic Configuration
assetic:
    debug:          "%kernel.debug%"
    use_controller: false
    bundles:        [ GreenHouseHomeBundle ]
    #java: /usr/bin/java
    filters:
        cssrewrite: ~
        #closure:
        #    jar: "%kernel.root_dir%/Resources/java/compiler.jar"
        #yui_css:
        #    jar: "%kernel.root_dir%/Resources/java/yuicompressor-2.4.7.jar"
 
# Doctrine Configuration
doctrine:
    dbal:
        driver:   "%database_driver%"
        host:     "%database_host%"
        port:     "%database_port%"
        dbname:   "%database_name%"
        user:     "%database_user%"
        password: "%database_password%"
        charset:  UTF8
        # if using pdo_sqlite as your database driver:
        #   1. add the path in parameters.yml
        #     e.g. database_path: "%kernel.root_dir%/data/data.db3"
        #   2. Uncomment database_path in parameters.yml.dist
        #   3. Uncomment next line:
        #     path:     "%database_path%"
        types:
            json: Sonata\Doctrine\Types\JsonType
    orm:
        auto_generate_proxy_classes: "%kernel.debug%"
        auto_mapping: true
 
# Swiftmailer Configuration
swiftmailer:
    transport: "%mailer_transport%"
    host:      "%mailer_host%"
    username:  "%mailer_user%"
    password:  "%mailer_password%"
    spool:     { type: memory }
 
sonata_admin:
    title:      Green House Adminstration
 
sonata_block:
    default_contexts: [cms]
    blocks:
        # Enable the SonataAdminBundle block
        sonata.admin.block.admin_list:
            contexts:   [admin]
        sonata.block.service.text:
        sonata.block.service.action:
        sonata.block.service.rss:
        sonata.block.service.menu:
        # Your other blocks
 
sonata_user:
    security_acl:           false
    impersonating_route:    green_house_home_homepage # or any route you want to use
    class:
        user: GreenHouse\HomeBundle\Entity\user
        group: GreenHouse\HomeBundle\Entity\group
 
fos_user:
    db_driver: orm
    firewall_name: main
    user_class: GreenHouse\HomeBundle\Entity\user
 
    group:
        group_class:   GreenHouse\HomeBundle\Entity\group
        group_manager: sonata.user.orm.group_manager
 
    service:
        user_manager: sonata.user.orm.user_manager
et routing.yml

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green_house_home:
    resource: "@GreenHouseHomeBundle/Resources/config/routing.yml"
    prefix:   /
 
app:
    resource: "@AppBundle/Controller/"
    type:     annotation
 
admin:
    resource: '@SonataAdminBundle/Resources/config/routing/sonata_admin.xml'
    prefix: /admin
 
fos_user_security:
    resource: "@FOSUserBundle/Resources/config/routing/security.xml"
 
fos_user_profile:
    resource: "@FOSUserBundle/Resources/config/routing/profile.xml"
    prefix: /profile
 
fos_user_register:
    resource: "@FOSUserBundle/Resources/config/routing/registration.xml"
    prefix: /register
 
fos_user_resetting:
    resource: "@FOSUserBundle/Resources/config/routing/resetting.xml"
    prefix: /resetting
 
fos_user_change_password:
    resource: "@FOSUserBundle/Resources/config/routing/change_password.xml"
    prefix: /change-password
 
soanata_user:
    resource: '@SonataUserBundle/Resources/config/routing/admin_security.xml'
    prefix: /admin
 
_sonata_admin:
    resource: .
    type: sonata_admin
    prefix: /admin
je vous prie de m'aider si vous avez une idée