error with standalone latte

Hi
İ've installed latte via composer:
composer require latte/latte

but i have this error
Fatal error: Uncaught RuntimeException: Missing template file ‘Hello.latte’. in /storage/emulated/legacy/Aboureyhan/vendor/latte/latte/src/Latte/Loaders/FileLoader.php:42 Stack trace: #0 /storage/emulated/legacy/Aboureyhan/vendor/latte/latte/src/Latte/Engine.php(126): Latte\Loaders\FileLoader->getContent(‘Hello.latte’) #1 /storage/emulated/legacy/Aboureyhan/vendor/latte/latte/src/Latte/Engine.php(206): Latte\Engine->compile(‘Hello.latte’) #2 /storage/emulated/legacy/Aboureyhan/vendor/latte/latte/src/Latte/Engine.php(109): Latte\Engine->loadTemplate(‘Hello.latte’) #3 /storage/emulated/legacy/Aboureyhan/vendor/latte/latte/src/Latte/Engine.php(86): Latte\Engine->createTemplate(‘Hello.latte’, Array) #4 /storage/emulated/legacy/Aboureyhan/index.php(12): Latte\Engine->render(‘Hello.latte’, Array) #5 {main} thrown in /storage/emulated/legacy/Aboureyhan/vendor/latte/latte/src/Latte/Loaders/FileLoader.php on line 42

İt is my index.php

<?php
require_once('vendor/autoload.php');
$latte = new Latte\Engine;

$latte->setTempDirectory('template');

$params = [
'items' => ['one', 'two', 'three'],
];

// render to output
$latte->render('Hello.latte', $params);
// or render to string
$html = $latte->renderToString('Hello.latte', $params);
?>