Parse server query returning empty

Question

I picked up a design from a Listrview’s website Android Hive

On this site he makes a query on the parse server and returns the list. I did the same thing in mine but using my server parse. It does the query but does not show the data on the screen. I tried to access via browser and shows the following message:

{"error":""}

I know this has to do with authentication. But I took the same code from the site and there is no key api Rest. I can’t understand how his goes and mine doesn’t. If I change the link and put his works normally.

In the example code, to do the search it only uses this:

// Movies json url
private static final String url = "http://api.androidhive.info/json/movies.json";