Getting Data to Display in Appian

I have managed to get the API to successfully import data from Big Query, However, I am struggling to get the data's to display in the Data Previews.

I have created the rule!Pulling_Data().result.body.rows.f along with the:

createdictionary(
{"ClientID","Client","Project","Developer","Hours"},
fv!item.v
)

so that the rows are split into columns, however, although the test is successful with this output. There is no data in the "Data Preview"

Is there a way around this, or something I am doing wrong that is now allowing the rows to display?