I have a problem at checkout on my website
Basically once one has filled all the required billing and shipping fields and pressed on "make a purchase" this message appears and stops the whole process: "You must select a shipping method, otherwise we cannot process your order."
There is no option where one can select a shipping method meaning no one can make a purchase.
I haven't found the solution.
In my setting the shipping is set to flat rate.
Do you know how I can solve this problem?