ocr识别返回9301002call api service failed？

 wx.serviceMarket.invokeService({
    service: 'wx79ac3de8be320b71',
    api: 'OcrAllInOne',
    data: {
      data_type: 2,
      ocr_type: 2,
      img_data: imgBase64
    }
  })

invokeService:fail 9301002 call api service failed (requestId: MLw9VEG4PhwadmTC2ieWjJTqQzc-h-JteEApAzOoBIvFJuzenpnHyWeVsq_kNylg9vE)