wx.canvasToTempFilePath 生成图片报错?

TypeError: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The provided value is not of type '(CSSImageValue or HTMLImageElement or SVGImageElement or HTMLVideoElement or HTMLCanvasElement or ImageBitmap or OffscreenCanvas)'

代码片段：https://developers.weixin.qq.com/s/I6HU8XmP7Vry