This is super old, but I just ran into this. Permissions were correct and we were all scratching our heads. It turned out there was another active sprint in the project. The "View" for the "Active Sprint" board was accounting for all the open sprints in the project. Therefore, changing the view to the sprint that you are looking for will allow you to close the sprint.
Hi All! We’re excited to share the launch of an announcement banner that lets Jira site administrators communicate directly to their users across their Jira Cloud instance. ...
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