Working :

- fix route name in ConfigController

core/lib/Thelia/Controller/Admin/ConfigController.php

@@ -241,7 +241,7 @@ class ConfigController extends BaseAdminController
             if ($this->getRequest()->get('save_mode') == 'stay') {
 
                 $this->redirectToRoute(
-                        "admin.configuration.variables.change",
+                        "admin.configuration.variables.update",
                         array('variable_id' => $variable_id)
                 );
             }

core/lib/Thelia/Controller/BaseController.php

@@ -215,7 +215,7 @@ class BaseController extends ContainerAware
         $route = $this->container->get($routerName)->getRouteCollection()->get($routeId);
 
         if ($route == null) {
-            throw new InvalidArgumentException(sprintf("Route ID '%s' does not exists.", $routeId));
+            throw new \InvalidArgumentException(sprintf("Route ID '%s' does not exists.", $routeId));
         }
 
         return $route->getPath();