Hey,
I am trying to use the header builder, but if I activated it, the website is no longer available. There is no connection anymore. I do not know what happens with it. Maybe you can have a look. It is the first time I want to use this feature, because I saw, that the old header-options will be limited to 127days. So I thought, it is a nice new feature, but it does not work at the moment for us.
Regards