获取HarmonyOS 鸿蒙Next相册数据失败 Error: System inner fail

打开了图片与视频权限，调用了savebutton，但还是无法正常获取到相册数据（此逻辑直接用的官方文档代码）。
SaveButton()
  .onClick((event, result: SaveButtonOnClickResult) => {
    if (result === SaveButtonOnClickResult.SUCCESS) {
      example()
    }
  })
  .width(200)
  .height(80)

let phAccessHelper = photoAccessHelper.getPhotoAccessHelper(getContext());

async function example() {

  try {
    let predicates: dataSharePredicates.DataSharePredicates = new dataSharePredicates.DataSharePredicates();
    let albumName: photoAccessHelper.AlbumKeys = photoAccessHelper.AlbumKeys.ALBUM_NAME;
    predicates.equalTo(albumName, ‘album_name’);
    let fetchOptions: photoAccessHelper.FetchOptions = {
      fetchColumns: [],
      predicates: predicates
    };

    let fetchResult: photoAccessHelper.FetchResult<photoAccessHelper.Album> = await phAccessHelper.getAlbums(photoAccessHelper.AlbumType.USER, photoAccessHelper.AlbumSubtype.USER_GENERIC, fetchOptions);
    let album: photoAccessHelper.Album = await fetchResult.getFirstObject();
    console.info('getAlbums successfully, albumName: ’ + album.albumName);
    fetchResult.close();
  } catch (err) {
    console.error('getAlbums failed with err: ’ + err);
  }
}