Searching for story arcs is not working

Hi,

I'm trying to search for story arcs via Comicvine-API:
https://comicvine.gamespot.com/api/search/?api_key=[your api key]&format=json&limit=10&resources=story_arc&query=Blackest&field_list=id,name,description,issues,publisher,image

The result indicates, that the request is okay, but the results-array is always empty:

{"error":"OK","limit":10,"offset":0,"number_of_page_results":10,"number_of_total_results":189,"status_code":1,"results":[],"version":"1.0"}

Is there anything wrong with the request or is it a problem with the Comicvine API?