Hi, I am new to Wolfram language. I am trying some examples in tutorial/AdvancedWebFormCreation. The example given under Dynamic Forms section is not working as explained. Here is the code: 
 
CloudDeploy[
 FormFunction[{"state" -> "USState", 
   "county" -> 
    TemplateSlot["state"][
     EntityProperty["AdministrativeDivision", "Subdivisions"]]}, 
  Identity]]
Could anybody please help?
Thanks & Regards, Murali