Exeption by creating pdf using kartik widget

[color=#242729][font=Arial,]I will get following error creating pdf file using kartik\grid\GridView:[/font][/color][font="Arial, Helvetica Neue, Helvetica, sans-serif"][color="#242729"][size=2]


Invalid Call – yii\base\InvalidCallExceptionThe parameters for yii2-grid export seem to be tampered. Please retry!

[/size][/color][/font][font="Arial, Helvetica Neue, Helvetica, sans-serif"][color="#242729"][size=2][/size][/color][/font][color=#242729][font=Arial,]Here is code of GridView. There is no other configuaration using kartik export[/font][/color][color=#242729][font=Arial,][/font][/color][color=#242729][font=Arial,]


                   	GridView::widget([                    'dataProvider' => $dataProvider,                    'filterModel' => $searchModel,                    'filterSelector' => '.choiceRadio',                    'id' => 'cb',                    'columns' => $gridColumn,                    'pjax' => true,                    'pjaxSettings' => [                        'neverTimeout' => true,                    ],                    'options' => [                        'style' => 'overflow: auto; word-wrap: break-word;'                    ],                    'condensed' => true,                    'responsiveWrap' => true,                    'hover' => true,                    'persistResize' => true,                    'resizeStorageKey' => Yii::$app->user->id . '-' . date("m"),                    'panel' => [                        "heading" => "[b] " . $this->title . "[/b]",                        'type' => 'danger',                        'after' => Html::a(' Reset Grid', ['/mail/mail-eingang/index'], ['class' => 'btn btn-warning', 'title' => 'Setzt die GridView zurück']),                        'toggleDataOptions' => ['minCount' => 10],                    ],                    'toolbar' => [                        '{export}',                        '{toggleData}'                    ],                ]);

[/font][/color][color=#242729][font=Arial,][/font][/color][color=#242729][font=Arial,]Here is code of method in Controller:[/font][/color][color=#242729][font=Arial,][/font][/color][color=#242729][font=Arial,]


   public function actionPdf($id) {        $model = $this->findModel($id);        $content = $this->renderAjax('_pdf', [            'model' => $model,        ]);        $pdf = new \kartik\mpdf\Pdf([            'mode' => \kartik\mpdf\Pdf::MODE_CORE,            'format' => \kartik\mpdf\Pdf::FORMAT_A4,            'orientation' => \kartik\mpdf\Pdf::ORIENT_PORTRAIT,            'destination' => \kartik\mpdf\Pdf::DEST_BROWSER,            'content' => $content,        ]);        return $pdf->render();    }

[/font][/color][color=#242729][font=Arial,][/font][/color][color=#242729][font=Arial,]Any ideas, what I do wrong?[/font][/color][font="Arial, Helvetica Neue, Helvetica, sans-serif"][color="#242729"][size=2][/size][/color][/font][font="Arial, Helvetica Neue, Helvetica, sans-serif"][color="#242729"][size=2][/size][/color][/font][color=#242729][font=Arial,][/font][/color]