Language menu sends me to an empty page

Hello.

My page isdec.es has been configured to use Polylang. I’ve followed instructions and created the main page in other two languages. For example english: https://www.isdec.es/?page_id=772

When I click the link it opens the blog ??? If I edit the content I can see the real content. But when I send the url then it doesn’t show me the page but the blog.

I have created the menus and given them the proper language.

I don’t understand why this is happening, some help would be appreciated. Thank you.

The page I need help with: [log in to see the link]