Hi there, @jenny_p… if you look at the issue checker, it is likely telling you that you have a type mismatch between the shipping field and your multi-dropdown. Your shipping field needs to be associated with your shipping option set, and the field needs to be a list (which is a checkbox you can check when you create a new field). If you delete your current shipping field and create a new one that is set up like I described, you should be good to go.