小游戏获取微信关系链数据报错

https://developers.weixin.qq.com/minigame/dev/tutorial/open-ability/open-data.html?t=2018323
按照文档新建myOpenDataContext/index.js就报错,有人知道怎么回事吗

具体错误复制如下:
VM571:1 Failed to load scene: Error: [AssetLibrary] loading JSON or dependencies failed: Uuid Loader: Deserialize asset [res/import/fb/fb176d71-3400-44f3-95ca-e15f8ca7883c.json] failed : TypeError: Cannot read property ‘canvasId’ of undefined

canvasId 空了,查一下

没有canvasId啊,在哪里用的

请问查到了吗?我也遇到了同样的问题…