yii\base\ErrorException: Trying to get property 'nickname' of non-object in /www/jnoj/views/solution/index.php:32

[tdsoc2002]

Stack trace:

0 /www/jnoj/views/solution/index.php(32): yii\base\ErrorHandler->handleError(8, 'Trying to get p...', '/www/jnoj/views...', 32, Array)

1 [internal function]: yii\base\View->{closure}(Object(app\models\Solution), 32, 6, Object(yii\grid\DataColumn))

2 /www/jnoj/vendor/yiisoft/yii2/grid/DataColumn.php(230): call_user_func(Object(Closure), Object(app\models\Solution), 32, 6, Object(yii\grid\DataColumn))

3 /www/jnoj/vendor/yiisoft/yii2/grid/DataColumn.php(244): yii\grid\DataColumn->getDataCellValue(Object(app\models\Solution), 32, 6)

4 /www/jnoj/vendor/yiisoft/yii2/grid/Column.php(111): yii\grid\DataColumn->renderDataCellContent(Object(app\models\Solution), 32, 6)

5 /www/jnoj/vendor/yiisoft/yii2/grid/GridView.php(520): yii\grid\Column->renderDataCell(Object(app\models\Solution), 32, 6)

6 /www/jnoj/vendor/yiisoft/yii2/grid/GridView.php(489): yii\grid\GridView->renderTableRow(Object(app\models\Solution), 32, 6)

7 /www/jnoj/vendor/yiisoft/yii2/grid/GridView.php(353): yii\grid\GridView->renderTableBody()

8 /www/jnoj/vendor/yiisoft/yii2/widgets/BaseListView.php(160): yii\grid\GridView->renderItems()

9 /www/jnoj/vendor/yiisoft/yii2/grid/GridView.php(321): yii\widgets\BaseListView->renderSection('{items}')

10 /www/jnoj/vendor/yiisoft/yii2/widgets/BaseListView.php(135): yii\grid\GridView->renderSection('{items}')

11 [internal function]: yii\widgets\BaseListView->yii\widgets{closure}(Array)

12 /www/jnoj/vendor/yiisoft/yii2/widgets/BaseListView.php(138): preg_replace_callback('/{\w+}/', Object(Closure), '{items}{pager}')

13 /www/jnoj/vendor/yiisoft/yii2/grid/GridView.php(296): yii\widgets\BaseListView->run()

14 /www/jnoj/vendor/yiisoft/yii2/base/Widget.php(140): yii\grid\GridView->run()

15 /www/jnoj/views/solution/index.php(88): yii\base\Widget::widget(Array)

16 /www/jnoj/vendor/yiisoft/yii2/base/View.php(336): require('/www/jnoj/views...')

17 /www/jnoj/vendor/yiisoft/yii2/base/View.php(254): yii\base\View->renderPhpFile('/www/jnoj/views...', Array)

18 /www/jnoj/vendor/yiisoft/yii2/base/View.php(156): yii\base\View->renderFile('/www/jnoj/views...', Array, Object(app\controllers\SolutionController))

19 /www/jnoj/vendor/yiisoft/yii2/base/Controller.php(384): yii\base\View->render('index', Array, Object(app\controllers\SolutionController))

20 /www/jnoj/controllers/SolutionController.php(45): yii\base\Controller->render('index', Array)

21 [internal function]: app\controllers\SolutionController->actionIndex()

22 /www/jnoj/vendor/yiisoft/yii2/base/InlineAction.php(57): call_user_func_array(Array, Array)

23 /www/jnoj/vendor/yiisoft/yii2/base/Controller.php(157): yii\base\InlineAction->runWithParams(Array)

24 /www/jnoj/vendor/yiisoft/yii2/base/Module.php(528): yii\base\Controller->runAction('index', Array)

25 /www/jnoj/vendor/yiisoft/yii2/web/Application.php(103): yii\base\Module->runAction('solution/index', Array)

26 /www/jnoj/vendor/yiisoft/yii2/base/Application.php(386): yii\web\Application->handleRequest(Object(yii\web\Request))

27 /www/jnoj/web/index.php(12): yii\base\Application->run()

28 {main}