Can't Login with Facebook – Email Access Problem

Hi,
I am getting this message when trying to login with Facebook:

You must allow us to access your email. Please edit your app settings and try again.

What do I need to do?

This is the website and login page: https://www.thepositiv.com/send-positive-content-the-positiv/

https://www.ads-software.com/plugins/contributer/