HarmonyOS 鸿蒙Next大佬们麻烦看看，为什么下面这个扫一扫的demo报1000500001，现象是黑屏呀

HarmonyOS 鸿蒙Next大佬们麻烦看看，为什么下面这个扫一扫的demo报1000500001，现象是黑屏呀 MatePad用Api12，DevEco Studio版本是5.0.5.300，扫一扫demo，报1000500001错误，下面是代码，我该怎么操作？

import { Logger } from '../common/utils/Logger';
import { customScan, scanBarcode } from '@kit.ScanKit';
import { BusinessError } from '@kit.BasicServicesKit';

@Entry
@Component
struct CustomScanPage{
  // 设置预览流高度，默认单位：vp
  @State cameraHeight: number = 640
  // 设置预览流宽度，默认单位：vp
  @State cameraWidth: number = 360
  private mXComponentController: XComponentController = new XComponentController();

  build() {
    Stack() {
      XComponent({
        id: 'componentId',
        type: 'surface',
        controller: this.mXComponentController
      })
        .onLoad(() => {
          Logger.info('[Scan Sample] '+ 'onLoad is called')
          // 获取XComponent的surfaceId
          let surfaceId: string = this.mXComponentController.getXComponentSurfaceId();
          Logger.info( 'viewControl '+`onLoad surfaceId: ${surfaceId}`);
          // 设置ViewControl相应字段
          let viewControl: customScan.ViewControl = {
            width: this.cameraWidth,
            height: this.cameraHeight,
            surfaceId: surfaceId
          };
          try {
            customScan.start(viewControl, (error: BusinessError, scanResult: Array<scanBarcode.ScanResult>) => {
              if (error) {
                Logger.error( '[Scan Sample] start failed , error: '+ JSON.stringify(error))
                return;
              }
              Logger.info( '[Scan Sample] callback scan result: '+ JSON.stringify(scanResult))
            });
          } catch (error) {
            Logger.error( '[Scan Sample] start failed , error: '+ JSON.stringify(error))
          }
        })
          // 预览流宽、高，默认单位vp，支持px、lpx、vp
          .height(this.cameraHeight)
          .width(this.cameraWidth)
          .position({ x: 0, y: 0 })
    }
    .alignContent(Alignment.Bottom)
    .height('100%')
    .width('100%')
    .position({ x: 0, y: 0 })
  }
}