Hi @nickolaas
Your screenshot failed to show the location rules, so I don’t know where you are entering the data for this field group.
Perhaps the issue is that you have saves the custom field values to a specific post or page. That means the data is only available on that post’s url.
Perhaps you need to look at the options page add-on to save the data to a global / static area where you can then retrieve it on any page in your template (footer.php)
Does that help?
Thanks
E
