CakePhp3.3 Error: Class 'CakeHaml\View\CakeHamlView' not found - cakephp

Question

Pardon me as this is my first questions.
I tried to install a plugin for haml in cakephp 3 manually, and found this k-motoyan/cake-haml
I can't install it using composer because I use cakephp 3.3.*
k-motoyan/cake-haml dev-master requires cakephp/cakephp 3.0.*-dev ->
no matching package found.
So, I tried to install it manually, downloading the zip and put it in [app]/plugins/kmotoyan/cakephp
I follow the readme setup
Setup
Add plugin load line to config/bootstrap.php file:
diff
+ Plugin::load('CakeHaml', ['bootstrap' => true]);
Set the default ViewClass on the src/Controller/AppController.php
file:
```diff class AppController extends Controller {
public $viewClass = 'CakeHaml\View\CakeHamlView'; ```
You can use haml on all your view files with .haml extension.
and put this code below in my config/bootstrap.php
Plugin::load('kmotoyan/CakeHaml', ['bootstrap' => true]);
and this code below in my src/Controller/AppController.php
public $viewClass = 'CakeHaml\\View\\CakeHamlView';
when I load the server, i get this error
Error: Class 'CakeHaml\View\CakeHamlView' not found File
C:\xampp\htdocs\qolega\vendor\cakephp\cakephp\src\View\ViewBuilder.php
Line: 363
when I see line 363 there's this line
return new $className($request, $response, $events, $data);
what should I do?