Describe the bug
ctx = MOR_API.createCanvasContext(this.data.canvasId, this)ctx为undefined
To Reproduce
代码地址:https://github.com/brainee/weixin-pages-morjs/tree/main
直接运行npm run dev
Expected behavior
echart能运行
Screenshots

Desktop (please complete the following information):
- OS: [e.g. iOS]
- Browser [e.g. chrome, safari]
- Version [e.g. 22]
Smartphone (please complete the following information):
- Device: [e.g. iPhone6]
- OS: [e.g. iOS8.1]
- Browser [e.g. stock browser, safari]
- Version [e.g. 22]
Additional context