wx.uploadFile 上传图片时，上传图片较大时 有时会上传失败，报如下错误，该怎么解决呢

WAServiceMainContext.js:1 MiniProgramError Unexpected token '<', "<!DOCTYPE "... is not valid JSON SyntaxError: Unexpected token '<', "<!DOCTYPE "... is not valid JSON at JSON.parse (<anonymous>) at parse (components/UploadMedia/UploadMedia.js:214:34)