Affected Products & Versions: BioStar 2.4
You cannot create a new user that can create a new custom level in the Settings > Account menu.
There is a limitation with the current API which did not allow creating a operator level with such privileges.
1. Create a user
2. Make the user operator level as Administrator (default full privilege operator)
3. Log in with the created user
4. Add Custom Level is unavailable.
Use the default admin account which was created on installing BioStar 2. This user has the privilege to add a custom admin level.
A official solution will be available in a future BioStar version (estimated to be 2.5) when the API has been altered.