Error Group not Found

Hi..getting error below
Failed to backup [gitlab.com] because of: 404: 404 Group Not Found

I did not set any group as no group set over my gitlab.
[gitlab.com]
type = gitlab
server = https://gitlab.com
token = mytokenid
group =



user =
gitlab20
backup_dir = ~/.gitlab-backup --->I change to gbackup_repo
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
I disable group and it does backup without any error....but the folder backup doesn't contain my code files...
(gitlab) root@mylab:/home/che/gbackup_repo/gitlab.com/chegitlab# ls
mypython_test2
(gitlab) root@mylab:/home/che/gbackup_repo/gitlab.com/chegitlab# cd mypython_test2/
(gitlab) root@mylab:/home/che/gbackup_repo/gitlab.com/chegitlab/mypython_test2# ls
26-Jul-2020-08-23.tar.gz
(gitlab) root@mylab:/home/che/gbackup_repo/gitlab.com/chegitlab/mypython_test2# ls
26-Jul-2020-08-23.tar.gz GITLAB_VERSION project.bundle tree
GITLAB_REVISION lfs-objects.json snippets VERSION

I couldn't find my repo codes in this backup folder. What could be wrong here. Thank you

No source files, tests, or entry points are named. Start by reproducing the backup with the shown GitLab configuration, then trace how empty or disabled group settings select projects and how repository contents are written; done means the backup completes without a group error and contains the expected code files.