I am using a drop shipper and have added rates based on weight. When I check out with product A I get the correct shipping rate. Same goes for product B. However when I add both A and B to the cart I get "Your cart has been updated and the items you added can’t be shipped to your address. Remove the items to complete your order."
I can not figure out where the problem is since individual both products show the correct shipping rate when they are added separately.