addPaymentByProductIdentifiers fail {"errMsg": "takeIAPAction:failapi addPaymentByProductIdentifiers fail Can't find SKProduct in cache by productIdentifier. Please make sure productsRequest has been invoked.", "err_code": "-2"} 下面是我的代码:  const requestObj = wx.miniapp.IAP.requestSKProducts({       productIdentifiers: [         'com.aizn.tech.mj.item1'       ],       success(ret) {         console.log(ret.invalidProductIdentifiers)         console.log(ret.products)         wx.miniapp.IAP.addPaymentByProductIdentifiers({           productIdentifier: 'com.aizn.tech.mj.item1',                   success: (args) => {             // addPayment调用成功，但是不代表交易完成。             console.log(`addPaymentByProductIdentifiers success`, args)           },           fail: (args) => {             // addPayment调用成功             console.error(`addPaymentByProductIdentifiers fail`, args)           }         })       },       fail(error) {         console.error(`requestSKProducts failed. ${error}`)       }     })