Unable to create a subgroup if Parent is Private

Summary

Staring with 15.3 unable to create a child group of a private parent group.

• Choose Parent Group
• create Subgroup
• Fails

Steps to reproduce

as above

Gitlab CE

Example Project

This does not occur on gitlab.com, but as we are running CE Reporting here.

What is the current bug behavior?

Sub Group creation fails

What is the expected correct behavior?

Sub group should be created

Relevant logs and/or screenshots

Output of checks

Results of GitLab environment info

Expand for output related to GitLab environment info

#### Results of GitLab application Check

System information
System:         Debian 10
Current User:   git
Using RVM:      no
Ruby Version:   2.7.5p203
Gem Version:    3.1.6
Bundler Version:2.3.15
Rake Version:   13.0.6
Redis Version:  6.2.7
Sidekiq Version:6.4.0
Go Version:     unknown

GitLab information
Version:        15.3.1
Revision:       16f34bd10fc
Directory:      /opt/gitlab/embedded/service/gitlab-rails
DB Adapter:     PostgreSQL
DB Version:     12.10
URL:            https://develop.tadpole.cc
HTTP Clone URL: https://develop.tadpole.cc/some-group/some-project.git
SSH Clone URL:  git@develop.tadpole.cc:some-group/some-project.git
Using LDAP:     no
Using Omniauth: yes
Omniauth Providers: github

GitLab Shell
Version:        14.10.0
Repository storage paths:
- default:      /var/opt/gitlab/git-data/repositories
GitLab Shell path:              /opt/gitlab/embedded/service/gitlab-shell

Expand for output related to the GitLab application check

Checking GitLab subtasks ...
Checking GitLab Shell ...
GitLab Shell: ... GitLab Shell version >= 14.10.0 ? ... OK (14.10.0)
Running /opt/gitlab/embedded/service/gitlab-shell/bin/check
Internal API available: OK
Redis available via internal API: OK
gitlab-shell self-check successful
Checking GitLab Shell ... Finished
Checking Gitaly ...
Gitaly: ... default ... OK
Checking Gitaly ... Finished
Checking Sidekiq ...
Sidekiq: ... Running? ... yes
Number of Sidekiq processes (cluster/worker) ... 1/1
Checking Sidekiq ... Finished
Checking Incoming Email ...
Incoming Email: ... Checking Reply by email ...
IMAP server credentials are correct? ... Checking partners@tadpole.cc
yes
Mailroom enabled? ... skipped
MailRoom running? ... skipped
Checking Reply by email ... Finished
Checking Incoming Email ... Finished
Checking LDAP ...
LDAP: ... LDAP is disabled in config/gitlab.yml
Checking LDAP ... Finished
Checking GitLab App ...
Database config exists? ... yes
All migrations up? ... yes
Database contains orphaned GroupMembers? ... no
GitLab config exists? ... yes
GitLab config up to date? ... yes
Log directory writable? ... yes
Tmp directory writable? ... yes
Uploads directory exists? ... yes
Uploads directory has correct permissions? ... yes
Uploads directory tmp has correct permissions? ... yes
Systemd unit files or init script exist? ... skipped (omnibus-gitlab has neither init script nor systemd units)
Systemd unit files or init script up-to-date? ... skipped (omnibus-gitlab has neither init script nor systemd units)
Projects have namespace: ...
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Redis version >= 6.0.0? ... yes
Ruby version >= 2.7.2 ? ... yes (2.7.5)
Git user has default SSH configuration? ... yes
Active users: ... 179
Is authorized keys file accessible? ... yes
GitLab configured to store new projects in hashed storage? ... yes
All projects are in hashed storage? ... yes
Checking GitLab App ... Finished
Checking GitLab subtasks ... Finished

Possible fixes