I am kinda new to acf.
I have some custom fields.
The fields are inside a group called upper_front.
the field foe example called cube_title_1.
I call them in front-page.php file.
this is the code in my functions.php page
That should work based on what I see in the screenshot… the only thing is that maybe that field group is not attached to an option page? Check in Location Rules below the field set to be sure that Options Page is set. And then of course, be sure it has a value 🙂