Multiple sorts on a!queryProcessAnalytics

I'm trying to apply a multiple sort on a query process report, trying to retrieve process tasks by different sorts, but I'm having an error:

errorMessage: "Grouping and aggregation are not supported. (APNX-1-4203-027)"

It seems is not supported for query process report, any solution?

a!queryProcessAnalytics(
  report: cons!TST_TASK_REPORT,
  contextProcessModels: cons!TST_PROCESS_MODEL,
  query: a!query(
    selection: a!querySelection(
      columns: {
        a!queryColumn(
          field: "c1"
        ),
        a!queryColumn(
          field: "c2"
        )
      }
    ),
    pagingInfo: a!pagingInfo(
      startIndex: 1,
      batchSize: 10,
      sort: {
        a!sortInfo(
          field: "c1",
          ascending: true
        ),
        a!sortInfo(
          field: "c2",
          ascending: true
        )
      }
    )
  )
)