I am using KoolReport in Laravel and I cannot use the Sort function of PivotMatrix, it keeps loading and shows the following error in the log.

Does not work follow the same problem.

 <form id='form1' class="form-inline" method="post">
    <?php
    \koolreport\pivot\widgets\PivotMatrix::create(array(
        "dataStore" => $this->dataStore("chequesPosfechadosPivot"),
        "name" => "PivotMatrix1",
        'paging' => array(
            'size' => 10,
            'sizeSelect' => array(5, 10, 20, 50, 100)
        ),
        'rowSort' => array(
            'FECHA' => 'asc'
        ),

        "scope" =>  array(
            "_token" => csrf_token(),
        ),
        'template' => 'PivotMatrix-Bun',
        "rowDimension" => "row",
        "columnDimension" => "column",
        'showDataHeaders' => false,
        'hideTotalRow' => false,
        'hideTotalColumn' => false,
        'hideSubtotalRow' => false,
        'hideSubtotalColumn' => true,
        'rowCollapseLevels' => array(0),
        'columnCollapseLevels' => array(0),
        'totalName' => '<b>TOTAL</b>',
        'headerMap' => array(
            'VALOR - sum' => 'CLIENTE | NÚMERO DE CHEQUE',
            '0000-00-00' => 'ANTES',
            '9999-12-31' => 'DESPUÉS'
        ),
        'cssClass' => array(
            'dataCell' => function ($value, $cellInfo) {
                return 'text-right small';
            },
            'columnHeader' => function ($header, $headerInfo) {
                return 'bg-success small';
            },
            'rowHeader' => function ($header, $headerInfo) {
                return 'small';
            },


        ),
    ));

    ?>
    </form>