小程序码无限制生成报错 err47001

saoma() {

uni.showLoading({
title: "加载中"
})
this.showins2 = true
this.$url.MUrl("userGetWxAccessToken").then(e => {
var d = JSON.parse(e.data)
var that = this
uni.request({
url: `https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=${d.access_token}`,
method: "POST",
data: {
page: 'pages/mine/index',
scene: "111"
},
responseType: 'arraybuffer',
success: function(res) {
let src = uni.arrayBufferToBase64(res.data);
that.codeImg = 'data:image/png;base64,' + src;
uni.hideLoading()
}
})
})
},

下图这个不是必填