Drilldown not returning results

I have a drilldown set up in a panel on a dashboard, and it's not returning any results. I have tested the underlying search, and it returns results as I would like. For some reason, the view shows that the search is being executed, but no results are appearing. Am I doing something wrong?

the code:

<module name="HiddenPostProcess" layoutPanel="panel_row1_col1" group="Longest Time to Level(Based on Median)" autoRun="False">
  <param name="search">fields "Level Reached", "Median Time to Level"</param>
  <param name="groupLabel">Longest Time to Level(Based on Median)</param>
  <module name="ViewstateAdapter">
    <module name="HiddenFieldPicker">
      <param name="strictMode">True</param>
      <module name="JobProgressIndicator">
        <module name="EnablePreview">
          <param name="enable">True</param>
          <param name="display">False</param>
          <module name="HiddenChartFormatter">
            <param name="charting.secondaryAxisTitle.text">Minutes</param>
            <param name="charting.chart">bar</param>
            <module name="FlashChart">
              <param name="width">100%</param>
              <module name="HiddenSearch">
                <param name="search">index=zos_gameplay event_type=level source_player_level=$token$ | table source_player_id, played_time</param>
                <param name="earliest">-7d</param>
                <module name="ConvertToIntention">
                  <param name="intention">
                    <param name="name">stringreplace</param>
                    <param name="arg">
                      <param name="token">
                        <param name="value">$click.value$</param>
                      </param>
                    </param>
                  </param>
                  <module name="JobProgressIndicator"></module>
                  <module name="SimpleResultsHeader">
                    <param name="entityName">results</param>
                    <param name="headerFormat">Top 10 Fastest Levelers for Level $click.value$</param>
                  </module> 
                  <module name="HiddenChartFormatter">
                    <param name="chart">bar</param>
                    <param name="primaryAxisTitle.text">Character Name</param>
                    <param name="secondaryAxisTitle.text">minutes</param>
                    <param name="legend.placement">none</param>
                    <module name="FlashChart">
                      <param name="width">100%</param>
                      <param name="height">160px</param>
                    </module>
                  </module>
                </module>
              </module>
            </module>
          </module>
        </module>
      </module>
    </module>
  </module>
</module>