"Bad Gateway" when including a page for a sidebar

I've got a page informations that I'm trying to include as a sidebar on every page from base.html.twig using the code

<aside>
    {% include 'modular.html.twig' with {'page': page.find('informations')} %}
</aside>

Unfortunately this code results in the infamous PHP-FPM "Bad Gateway" error under Nginix. Is there a better way to include a page from a template?

You probably need to just do page.find('/informations')

Thanks Flavio. I also missed the for loop, but now it works:

{% for page in page.find('/informations').children %}
     {{ page.content }}
 {% endfor %}
---