Error returned from daemon: Error Domain=com.apple.accounts Code=7 "(null)"

[JiangJuHong]

My device: iPhone 11
Device Version: IOS 13.3.1

When I tried to get a thumbnail of the video (MOV format) in the album, it reported the following error:

Error returned from daemon: Error Domain=com.apple.accounts Code=7 "(null)"

My code is:

String thumb = await VideoThumbnail.thumbnailFile(
        video: video.path,
        imageFormat: ImageFormat.JPEG,
        maxWidth: 128,
        // specify the width of the thumbnail, let the height auto-scaled to keep the source aspect ratio
        quality: 25,
);

video.path is: /private/var/mobile/Containers/Data/Application/E4FD1BE3-FEAE-42EA-8E41-A56CC7BC3B72/tmp/trim.B150B068-07B8-4A37-A426-FBDAF2910E3B.MOV