Пользовательское действие в контроллере не работает в yii2

У меня есть контроллер с именем RegisterController и представление индекса. Если я отправляю форму, она показывает страница не найдена (404) ошибка. В том же случае, если я изменю метод на actionCreate вместо actionAddBasic, работает нормально. Пожалуйста, помогите мне решить проблему. Благодарю.

RegisterController.php

<?php
namespace app\controllers;

use app\models\Address;
use yii;
use yii\filters\AccessControl;
use yii\web\Controller;
use yii\filters\VerbFilter;
use app\models\BasicInfo;
use app\models\User;

/**
* Class RegisterController
* To Handle Registration Related Requests.
*/
class RegisterController extends Controller
{
public function behaviors()
{
return [
'access' => [
'class' => AccessControl::className(),
'only' => ['addBasic'],
'rules' => [
[
'actions' => ['addBasic'],
'allow' => true,
'roles' => ['?'],
],
],
],
'verbs' => [
'class' => VerbFilter::className(),
'actions' => [
'addBasic' => ['post'],
],
],
];
}/**
* To Load Registration Page.
*/
public function actionIndex()
{
$user = new User();
$basicInfo = new BasicInfo();
$basicInfo->gender = 1;
$fileUpload = new FileUpload();
$addressModel = new Address();
return $this->render('index', [
'userModel' => $user,
'basicInfoModel' => $basicInfo,
'fileUploadModel' => $fileUpload,
'addressModel' => $addressModel
]);
}

public function actionAddBasic()
{
yii::trace('Inside AddBasic');
return $this->render('index', [
'userModel' => new User(),
'basicInfoModel' => new BasicInfo(),
'fileUploadModel' => new FileUpload(),
'addressModel' => new Address()
]);
}

}

Регистр / index.php:

    <?php
use yii\helpers\Html;
use yii\helpers\ArrayHelper;
use yii\widgets\ActiveForm;
use app\models\MaritalStatus;
use app\models\ProfileFor;

?>
<div class="form">
<?php $form = ActiveForm::begin(['id' => 'form-signup-1', 'action' => ['index.php/register/addBasic']]); ?>

<div class="row">
<?= $form->field($basicInfoModel, 'name')->textInput(['maxlength' => 25, 'placeholder' => 'Name']) ?>
</div>
<div class="row">
<?= $form->field($userModel, 'email')->input('email', ['maxlength' => 30, 'placeholder' => 'Email']) ?>
</div>
<div class="row">
<?= $form->field($userModel, 'mno')->input('text', ['maxlength' => 10, 'placeholder' => 'Mobile Number']) ?>
</div>
<div class="row" style="float: right;">
<?= Html::submitButton('Create', ['class' => 'btn btn-success']) ?>
<?= Html::resetButton('Reset', ['class' => 'btn btn-success']) ?>
</div>
<?php ActiveForm::end(); ?>
</div>