Multiple objects in JSON data source

[Karyang]

Describe the bug What's the correct way to access main and subs in Jasper Reports if there are multiple objects in JSON?

$extension = 'pdf' ;
$name = 'testeJasper';
$filename =  $name  . time();

$input = storage_path('app/public/relatorios/invoice.jasper');
$output = base_path('/public/reports/' . $filename);

$array = [
            [
              "category_id" => "1",
              "category_name" => "Module that will allow the pmmed to create a template first before cascading the PIs to offices from VP's OPCR"
            ],
            [
              "category_id" => "2",
              "category_name" => "Category 2"
            ],
            [
              "category_id" => "3",
              "category_name" => "Category 3"
            ]
        ];

$subReportSource = [
      ['program' => 'Higher', 'percentage' => '80%'],
      ['program' => 'Research', 'percentage' => '100%'],
    ];

$jsonArry = array('data' => ['main' => $array, 'subs' => $subReportSource ]);
$jsonTmpfilePath = storage_path('app/public'). '/relatorios/json/' . $name . '.json';
$jsonTmpfile = fopen($jsonTmpfilePath, 'w');
fwrite($jsonTmpfile, json_encode($jsonArry));
fclose($jsonTmpfile);
$datafile = $jsonTmpfilePath;

$options = [
        'format' => ['pdf'],
        'params' => [
          'msg' => "Display 101",
          'storage_path' => storage_path(),
        ],
        'locale' => 'en',
        'db_connection' => [
            'driver' => 'json',
            'data_file' => $datafile,
            'json_query' => 'data'
        ]
    ];

I tried to put this in my main.jrxml

<queryString language="json">
    <![CDATA[data.main]]>
</queryString>

and this one in my subReport.jrxml

<queryString language="json">
    <![CDATA[data.subs]]>
</queryString>

I just keep on getting this error