Singlestat panel with filters aggregation

Hello everybody,
I am trying to figure out how to show value in singlestat panel based on filters aggregation, but I have no luck so far. I am able to see data I want to show in panel (see scren below) in query inspector, but panel itself is still empty - it shows “no value”.

Has anybody any idea what should I do? I am using Grafana 5.4.2 and Elasticsearch 6.5.1.