This is an open forum for any mojoPortal topics that don't fall into the other categories.
how you can make sure it is displayed a banner at the top of the home page to meet the current standards imposed by privacy laws in Europe?
There are many ways to do this. All that is needed is a script to set a cookie when the user accepts the message. If they don't click the accept button, they continue to see the banner.
Here's a good article on how to do this. It doesn't reference mojoPortal but it will work fine with mojoPortal.