PHP Notice 'yii\base\ErrorException' with message 'Undefined variable: breadcrumbs' 

in /var/www/rudent/core/base/frontend/controllers/ProductController.php:129

Stack trace:
#0 /var/www/rudent/core/base/frontend/controllers/ProductController.php(129): yii\base\ErrorHandler->handleError(8, 'Undefined varia...', '/var/www/rudent...', 129, Array)
#1 /var/www/rudent/frontend/controllers/ProductController.php(21): core\base\frontend\controllers\ProductController->actionView('schetka-disk-dl...')
#2 [internal function]: frontend\controllers\ProductController->actionView('schetka-disk-dl...')
#3 /var/www/rudent/vendor/yiisoft/yii2/base/InlineAction.php(57): call_user_func_array(Array, Array)
#4 /var/www/rudent/vendor/yiisoft/yii2/base/Controller.php(157): yii\base\InlineAction->runWithParams(Array)
#5 /var/www/rudent/vendor/yiisoft/yii2/base/Module.php(528): yii\base\Controller->runAction('view', Array)
#6 /var/www/rudent/vendor/yiisoft/yii2/web/Application.php(103): yii\base\Module->runAction('product/view', Array)
#7 /var/www/rudent/vendor/yiisoft/yii2/base/Application.php(386): yii\web\Application->handleRequest(Object(yii\web\Request))
#8 /var/www/rudent/frontend/web/bootstrap.php(48): yii\base\Application->run()
#9 {main}