yii\base\ErrorException: Use of undefined constant z - assumed 'z' in /var/www/karta/common/widgets/gridview/views/pin.php:2
Stack trace:
#0 /var/www/karta/common/widgets/gridview/views/pin.php(2): yii\base\ErrorHandler->handleError(8, 'Use of undefine...', '/var/www/karta/...', 2, Array)
#1 /var/www/karta/vendor/yiisoft/yii2/base/View.php(328): require('/var/www/karta/...')
#2 /var/www/karta/vendor/yiisoft/yii2/base/View.php(250): yii\base\View->renderPhpFile('/var/www/karta/...', Array)
#3 /var/www/karta/vendor/yiisoft/yii2/base/View.php(152): yii\base\View->renderFile('/var/www/karta/...', Array, Object(common\widgets\gridview\GridView))
#4 /var/www/karta/vendor/yiisoft/yii2/base/Widget.php(234): yii\base\View->render('pin', Array, Object(common\widgets\gridview\GridView))
#5 /var/www/karta/common/widgets/gridview/GridView.php(79): yii\base\Widget->render('pin', Array)
#6 /var/www/karta/vendor/yiisoft/yii2/widgets/BaseListView.php(155): common\widgets\gridview\GridView->renderItems()
#7 /var/www/karta/common/widgets/gridview/GridView.php(55): yii\widgets\BaseListView->renderSection('{items}')
#8 [internal function]: common\widgets\gridview\GridView->common\widgets\gridview\{closure}(Array)
#9 /var/www/karta/common/widgets/gridview/GridView.php(58): preg_replace_callback('/{\\w+}/', Object(Closure), '{items}')
#10 /var/www/karta/vendor/yiisoft/yii2/base/Widget.php(139): common\widgets\gridview\GridView->run()
#11 /var/www/karta/frontend/views/site/index.php(68): yii\base\Widget::widget(Array)
#12 /var/www/karta/vendor/yiisoft/yii2/base/View.php(328): require('/var/www/karta/...')
#13 /var/www/karta/vendor/yiisoft/yii2/base/View.php(250): yii\base\View->renderPhpFile('/var/www/karta/...', Array)
#14 /var/www/karta/vendor/yiisoft/yii2/base/View.php(152): yii\base\View->renderFile('/var/www/karta/...', Array, Object(frontend\controllers\SiteController))
#15 /var/www/karta/vendor/yiisoft/yii2/base/Controller.php(381): yii\base\View->render('/site/index', Array, Object(frontend\controllers\SiteController))
#16 /var/www/karta/frontend/controllers/SiteController.php(72): yii\base\Controller->render('/site/index', Array)
#17 [internal function]: frontend\controllers\SiteController->actionIndex()
#18 /var/www/karta/vendor/yiisoft/yii2/base/InlineAction.php(57): call_user_func_array(Array, Array)
#19 /var/www/karta/vendor/yiisoft/yii2/base/Controller.php(156): yii\base\InlineAction->runWithParams(Array)
#20 /var/www/karta/vendor/yiisoft/yii2/base/Module.php(523): yii\base\Controller->runAction('index', Array)
#21 /var/www/karta/vendor/yiisoft/yii2/web/Application.php(102): yii\base\Module->runAction('site/index', Array)
#22 /var/www/karta/vendor/yiisoft/yii2/base/Application.php(380): yii\web\Application->handleRequest(Object(yii\web\Request))
#23 /var/www/karta/frontend/web/index.php(17): yii\base\Application->run()
#24 {main}