Homepage not indexable by search engines

Hello guys.

I am receiving reports that the homepage of my website is not indexable by search engines.
I tried to use some plugins to help me with that like Yoast SEO, but I still don’t know the reasons and how to fix it.
Can you guys help me? Some ideas or know where I can get some help with that?

Thanks,

Roberto – Brazil.

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