I have several advertising campaigns and a test application on Facebook (status: in development). I normally get meta information on advertising objects. But when I try to get insights on campaigns through the Facebook Marketing API, only an empty array comes back.
{ "data": [ ] } The access token has all the necessary permissions. At the same time, insights from the sandbox comes well through the same methods (only the access token is also from the sandbox). What can be wrong? Does Facebook give statistics on real advertising campaigns only to published applications?
