在微信后台，看到几条如下报错:

n.callback is not a function;at api requestVirtualPayment complete callback function TypeError: n.callback is not a function at https://lib/WAGame.js:1:416645at Function.complete (https://lib/WAGame.js:1:423916)at Object.complete (https://lib/WAGame.js:1:203259)at dt (https://lib/WAGame.js:1:266875)at https://lib/WAGame.js:1:267776at Object.m (https://lib/WAGame.js:1:1353)

目前无法重现。

调用支付的代码如下：

var c = b.callbackUrl;

wx.requestMidasPayment({ mode: b.mode, env: b.env, offerId: b.offerId, currencyType: b.currencyType, platform: b.platform, buyQuantity: b.buyQuantity, zoneId: b.zoneId, success: function() { console.log("success，" + c), wx.request({ url: c }) }, fail: function() { console.log("fail，" + b.callbackUrlFail) } })

请问是什么原因导致的报错，该如何解决？