Symfony2 Sylius setting the default locale - symfony

Question

When I want to create a Shipment I get the error:
An exception has been thrown during the rendering of a template ("No locale has been set and current locale is undefined.") in SonataAdminBundle::standard_layout.html.twig at line 148.
I think I need to set the default locale for sylius, but I tried alot of examples, none of them helped..
I currently have this setup:
Config.yml:
sylius_shipping:
driver: doctrine/orm # Configure the Doctrine ORM driver used in documentation.
classes:
shipping_method:
model: Application\Sylius\ShippingBundle\Entity\ShippingMethod
translation:
model: Application\Sylius\ShippingBundle\Entity\ShippingMethodTranslation
shipping_method_rule:
model: Application\Sylius\ShippingBundle\Entity\Rule
shipment:
model: Application\Sylius\ShippingBundle\Entity\Shipment
shipment_item:
model: Application\Sylius\ShippingBundle\Entity\ShipmentItem
shipping_category:
model: Application\Sylius\ShippingBundle\Entity\ShippingCategory
#stof_doctrine_extensions:
# orm:
# default:
# timestampable: true
parameters:
sylius.locale: %locale%
#sylius_locale:
# driver: doctrine/orm
sylius_translation:
default_locale: "%locale%"
#sylius_translation:
# default_locale: %sylius.locale%
Parameters.yml:
sylius.currency_importer.ecb.base_currency: EUR
sylius.currency_importer.open_exchange_rates: EDITME
sylius.locale: en_US
Nothing works..
UPDATE
By changing my config to this:
framework:
#esi: ~
translator: { fallback: %sylius.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: "%sylius.locale%"
parameters:
sylius.locale: 'en'
#sylius_locale:
# driver: doctrine/orm
sylius_translation:
default_locale: %sylius.locale%
I still get the same error. I cleared my cache.

Answer 1

Try %sylius.locale%. It looks like you've just not put in the full name of the parameter in your config file.
If you've updated the value and it's not working, make sure you clear your cache.
$ app/console cache/clear --env=dev
$ app/console cache/clear --env=prod
You will also require something like this:
imports:
- { resource: parameters.yml }
Otherwise the parameters you enter will not be loaded into the configuration file.