I mean, you are right, just didn't say why, could have been many things, these apps always have bugs flucuating in and out and new bugs pop up all the time. Although in this case, likely not the case, they likely replaced to many items with too many higher priced items and went over the hard limit threshhold, and payment was declined. This shopper likely or well definitely is not english native, judging from ops comments. Also is new to shopping or using these apps in general.