ga:isoYear'.'W'.'IsoWeek

controllers/IndexController.php

@@ -76,7 +76,7 @@ class IndexController extends \app\controllers\HomeController
             'date'=>"ga:date",
           ],
           'week'=>[
-            'date'=>'ga:isoYearIsoWeek',
+            'date'=>'ga:isoYear'.'W'.'IsoWeek',
           ],
           'month'=>[
             'date'=>'ga:yearMonth'