i have promo code but something come errors
Re: i have promo code but something come errors
The thing with promotional coupon is, the majority of them are generated for specific countries and can be applied on condition that the country the coupon's made for matches the country AdWords account has billing information for. For example, if you have a promo coupon for the US, you cannot apply it if your billing country is Italy and vice versa.
Therefore the error message seems normal unless the coupon's "origin" country matches your billing country. If not, I suppose the best thing is to contact AdWords Support team here.