Board filter is dynamic based on category. This prevents us from having to manually add a project each time.
The board settings doesn't show an error about projects, it in fact knows we currently have 50 projects returned.
All 50 projects use the same permission scheme.
User has the manage sprints permission in that permission scheme.
They still can't close the sprint.
No archived projects exist.
Double and Triple checked that all projects in that category have that scheme.