Custom ViewHelper uses PHPRenderer instead of TwigRenderer

[castler]

I have custom ViewHelper where I want to use a template.

So in the ViewHelper i write something like

    public function __invoke()
    {
        return $this->getView()->render('templatename.twig', array('foo' => 'bar'));
    }

I register my custom ViewHelper like that

return array(
    'factories' => array(
        'ViewHelperName' => 'ModuleName\Service\Factory\ViewHelperFactory',
    ),
);

and also i register my ViewHelper in the TwigHelperPluginManager

    'zfctwig' => array(
        'helper_manager' => array(
            'configs' => array(
                'Navigation\Service\Factory\NavigationViewHelperNavigation',
                'ViewHelperName',
            ),
        )
    ),

But still the PhpRenderer is used and not the TwigRenderer.

Did I miss something?

Thanks for your help.

[kokspflanze]

hi for me works

return [
    'view_helpers' => [
        'aliases' => [
            'sidebarWidget' => Helper\SideBarWidget::class,
        ],
        'factories' => [
            Helper\SideBarWidget::class => InvokableFactory::class,
        ],
    ],
    'zfctwig' => [
        'helper_manager' => [
            'configs' => [
                HelperConfig::class
            ],
            'aliases' => [
                'sidebarWidget' => Helper\SideBarWidget::class,
            ],
            'factories' => [
                Helper\SideBarWidget::class => InvokableFactory::class,
            ],
        ],
    ],
];

my sidebar template looks like following

{{ "now"|date('y-m-d') }}

maybe that can help someone