已安装node.js 8.9.0 并安装wx-server-sdk,已创建云函数并上传云平台,访问云函数时报错

WACloud.js:1 Uncaught (in promise) Error: errCode: -404011 cloud function execution error | errMsg: cloud.callFunction:fail cloud function service error code -501005, error message Environment not found; at cloud.callFunction api; 

调用代码:

onLoad(){

wx.cloud.init({ env: 'text' })

wx.cloud.callFunction({

name:'add',

data:{

a:12,

b:19

}

}).then(console.log)

}