I am trying to add a group "R&D" to a project role in Jira Server but I can't see the group when I search even though same group exist in other projects.
This suggests you've already added it to the role.
No. This is a sample of the project that has the group user already.
So you've already added it. That's why it won't appear in the list, you already have it.
I haven't added it. See the affected project.
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