Associated Category no selection

-- url of the page with the problem -- : www.bordia.de
-- HikaShop version -- : 2.3.5
-- Joomla version -- : 3.4
-- PHP version -- : 5.4

Hi,

when creating a category list can not be selected in the menu HikaShop the Associated category. It will see the pop up where the category can be selected but the selected category will not be accepted.

Best regards

Daniel

When creating a menu in joomla I want to refer to a Category Overview in HikaShop. Unfortunately, I can not choose a category from the menu HikaShop. It is possible to click on the button "Auswahl" but I can not select a category to be displayed.

best regards