Yahoo Gemini error

Hi,

I'm not able to split by data by Category Name. I can get the data in the Gemini UI when I download a Conversion Report. I'm trying to mimic this report.  When I try to add it, it says "These metrics and dimensions can't be fetched together" and then when I remove everything except the metric "Impressions" split  by Category Name the error I get is "Query failed: Your query returned no data" 

I've attached a conversion report from Gemini where it has by day, by Category Name. This is what I'm looking for.