Exception 'Error' with message 'Call to a member function getModels() on null' 

in /www/wwwroot/job.inet.vn/frontend/views/news/index.php:15

Stack trace:
#0 /www/wwwroot/job.inet.vn/vendor/yiisoft/yii2/base/View.php(325): require()
#1 /www/wwwroot/job.inet.vn/vendor/yiisoft/yii2/base/View.php(247): yii\base\View->renderPhpFile('/www/wwwroot/jo...', Array)
#2 /www/wwwroot/job.inet.vn/vendor/yiisoft/yii2/base/View.php(149): yii\base\View->renderFile('/www/wwwroot/jo...', Array, Object(frontend\controllers\SiteController))
#3 /www/wwwroot/job.inet.vn/vendor/yiisoft/yii2/base/Controller.php(378): yii\base\View->render('/news/index', Array, Object(frontend\controllers\SiteController))
#4 /www/wwwroot/job.inet.vn/frontend/controllers/SiteController.php(511): yii\base\Controller->render('/news/index', Array)
#5 /www/wwwroot/job.inet.vn/frontend/controllers/SiteController.php(103): frontend\controllers\SiteController->getNewsByAlias('websites')
#6 [internal function]: frontend\controllers\SiteController->actionIndex()
#7 /www/wwwroot/job.inet.vn/vendor/yiisoft/yii2/base/InlineAction.php(55): call_user_func_array(Array, Array)
#8 /www/wwwroot/job.inet.vn/vendor/yiisoft/yii2/base/Controller.php(154): yii\base\InlineAction->runWithParams(Array)
#9 /www/wwwroot/job.inet.vn/vendor/yiisoft/yii2/base/Module.php(454): yii\base\Controller->runAction('index', Array)
#10 /www/wwwroot/job.inet.vn/vendor/yiisoft/yii2/web/Application.php(84): yii\base\Module->runAction('site/index', Array)
#11 /www/wwwroot/job.inet.vn/vendor/yiisoft/yii2/base/Application.php(375): yii\web\Application->handleRequest(Object(yii\web\Request))
#12 /www/wwwroot/job.inet.vn/frontend/web/index.php(21): yii\base\Application->run()
#13 {main}