Can not activate merge request approvals for the project
Summary
When I try to activate merge request approvals for the project from 'Project settings' page and save, got 'Approver groups is invalid'.
Steps to reproduce
- Open 'Project settings' page - https://gitlab.com/<group_name>/<project_name>/edit
- Check 'Activate merge request approvals'
- Add a few persons from the team, who works with this project.
- Click 'Save Channges'
What is the current bug behavior?
Shows msg: "The form contains the following error: Approver groups is invalid"
What is the expected correct behavior?
Update settings
Relevant logs and/or screenshots
Output of checks
This bug happens on GitLab.com
What's interesting
If I go, from settings page to project page - https://gitlab.com/<group_name>/<project_name> and then come back to settings, and repeat all steps, it works fine.