Hyperion: Essbase cannot connect to provider with error 404

Tonight the My Oracle Support article "Error "Cannot connect to the provider, Make sure it is running to the specified host/port, error 404"" by way of note ID 1966920.1 shows the result of misconfiguring the Essbase properties file!  Check out the article to learn which "service.olap.dataQuery.grid" property can cause this issue!