yii2 : layout of error not work - yii2

Question

i have site with rbac roles and when i get error for not access to some pages i get white page with error.
use these codes for had layout but didn't work true:
my siteControlle:
public function actionError()
{
$exception = Yii::$app->errorHandler->exception;
if ($exception !== null) {
$this->layout = 'main';
return $this->render('error', ['exception' => $exception]);
}
}
i have this function in sitecontroller and i think problem for this:
public function actions() {
return [
'error' => [
'class' => 'yii\web\ErrorAction',
],
'captcha' => [
'class' => 'yii\captcha\CaptchaAction',
'fixedVerifyCode' => YII_ENV_TEST ? 'testme' : null,
],
];
}
main.php:
'errorHandler' => [
'errorAction' => 'site/error',
],
error. php view page
<?php
use yii\helpers\Html;
$this->title = $name;
?>
<div class="site-error">
<h1><?= Html::encode($this->title) ?></h1>
<div class="alert alert-danger">
<?= nl2br(Html::encode($message)) ?>
</div>
<p>
The above error occurred while the Web server was processing your request.
</p>
<p>
Please contact us if you think this is a server error. Thank you.
</p>
i test my web with other error and i understand that other errors show in my view layout truely but just access error not in layout

Answer 1

In setup like yours method actionError() in your site controller is never called, because you declared error in method actions(), comment following lines:
'error' => [
'class' => 'yii\web\ErrorAction',
],
in your site controller and you should see your error, looking at your view you must pass values for name and message properties, something like this:
public function actionError() {
$exception = Yii::$app->errorHandler->exception;
if ($exception !== null) {
$this->layout = 'main';
return $this->render('error', ['name' => $exception->getCode(), 'message' => $exception->getMessage()]);
}
}
Of course site/error must be available in browser (setup rules in controller and paths on file system as needed).