Invalid value for paymentRequest(): country should be one of the following strings: AE, AT, AU, BE, BG, BR, CA, CH, CI, CR, CY, CZ, DE, DK, DO, EE, ES, FI, FR, GB, GI, GR, GT, HK, HR, HU, ID, IE, IN, IT, JP, LI, LT, LU, LV, MT, MX, MY, NL, NO, NZ, PE, PH, PL, PT, RO, SE, SG, SI, SK, SN, TH, TT, US, UY. You specified: CN.