<?php
/**
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @since         3.0.4
 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 */
namespace App\View;

use Cake\Event\EventManager;
use Cake\Network\Request;
use Cake\Network\Response;

/**
 * A view class that is used for AJAX responses.
 * Currently only switches the default layout and sets the response type -
 * which just maps to text/html by default.
 */
class AjaxView extends AppView
{

    /**
     * The name of the layout file to render the view inside of. The name
     * specified is the filename of the layout in /app/Template/Layout without
     * the .ctp extension.
     *
     * @var string
     */
    public $layout = 'ajax';

    /**
     * Initialization hook method.
     *
     * @return void
     */
    public function initialize()
    {
        parent::initialize();

        $this->response->type('ajax');
    }
}

<?php
/**
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @since         3.0.4
 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 */
namespace App\View;

use Cake\Event\EventManager;
use Cake\Network\Request;
use Cake\Network\Response;

/**
 * A view class that is used for AJAX responses.
 * Currently only switches the default layout and sets the response type -
 * which just maps to text/html by default.
 */
class AjaxView extends AppView
{

    /**
     * The name of the layout file to render the view inside of. The name
     * specified is the filename of the layout in /src/Template/Layout without
     * the .ctp extension.
     *
     * @var string
     */
    public $layout = 'ajax';

    /**
     * Initialization hook method.
     *
     * @return void
     */
    public function initialize()
    {
        parent::initialize();

        $this->response->type('ajax');
    }
}

Correct the layouts directory path in docblock.
Correct the layouts directory path in docblock.

Changed "/app/Template/Layout" to "/src/Template/Layout".