ezpublish configuration. Try to add a "public" siteaccess

ezpublish.yml

ezpublish:
    siteaccess:
        default_siteaccess: eng
        list:
            - ezdemo_site
            - eng
            - ezdemo_site_admin
            - fre
        groups:
            all_group:
                - ezdemo_site
                - eng
                - fre
                - ezdemo_site_admin
            eng_group:
                - ezdemo_site
                - eng
                - ezdemo_site_admin
            fre_group:
                - fre
            public_group:
                - ezdemo_site
                - eng
                - fre
        match:
            URIElement: '1'
    system:
        public_group:
            location_view:
                full:
                    news:
                        template: MyDesignBundle:full:news.html.twig
                        match:
                            Identifier\ContentType: news
                    news_folder:
                        template: MyDesignBundle:full:news_folder.html.twig
                        match:
                            Identifier\ContentType: news_folder
                line:
                    news:
                        template: MyDesignBundle:line:news.html.twig
                        match:
                            Identifier\ContentType: news
        all_group:
            database:
                type: mysql
                user: ezpublish5
                password: ezpublish5
                server: localhost
                database_name: ezpublish5
            var_dir: var/ezdemo_site
            image_variations:
                <all_alias>
        eng_group:
            languages:
                - eng-GB
        fre_group:
            languages:
                - fre-FR
        ezdemo_site_admin:
            legacy_mode: true
    imagemagick:
        enabled: true
        path: /usr/bin/convert
    http_cache:
        purge_type: local

site.ini

<?php /* #?ini charset="utf-8"?

[DatabaseSettings]
DatabaseImplementation=ezmysqli
Server=localhost
Port=
User=ezpublish5
Password=ezpublish5
Database=ezpublish5
Charset=
Socket=disabled

[InformationCollectionSettings]
EmailReceiver=

[Session]
SessionNamePerSiteAccess=disabled

[SiteSettings]
SiteName=eZ Publish Demo Site
SiteURL=<serveur>/ezpublish/ezpublish_5_0/web/fre
LoginPage=embedded
AdditionalLoginFormActionURL=http://<serveur>/ezpublish/ezpublish_5_0/web/ezdemo_site_admin/user/login

[UserSettings]
RegistrationEmail=

[SiteAccessSettings]
RequireUserLogin=false
RelatedSiteAccessList[]
RelatedSiteAccessList[]=ezdemo_site
RelatedSiteAccessList[]=eng
RelatedSiteAccessList[]=ezdemo_site_admin
RelatedSiteAccessList[]=fre
ShowHiddenNodes=false

[DesignSettings]
SiteDesign=ezdemo
AdditionalSiteDesignList[]
AdditionalSiteDesignList[]=ezflow
AdditionalSiteDesignList[]=base
AdditionalSiteDesignList[]=standard

[RegionalSettings]
Locale=eng-GB
ContentObjectLocale=eng-GB
ShowUntranslatedObjects=disabled
SiteLanguageList[]
SiteLanguageList[]=eng-GB
TextTranslation=disabled

[FileSettings]
VarDir=var/ezdemo_site

[ContentSettings]
TranslationList=

[MailSettings]
AdminEmail=jonathan.hurtrel@actimage.com
EmailSender=
*/ ?>