Hi there
I found for this problem a similar thread, but it dosent work for me. Or i made it false =/
The similar post: https://community.atlassian.com/t5/Jira-Software-questions/Create-sprint-button-inactive-for-a-user/qaq-p/884431
Users send my an email, that the sprint button is not active.

All my projects has the same group in the Option "users and roles" => "Sprint Manager"

The same group is also in the option "Permissons => "Manage Sprints" defined.
My test user is in this group.
Most of my Boards has the "Create sprint" button active.
But a few doesnt.
________
One of the boards where isn't working has the following inputs:
Filter Query: component = BLABLA OR labels = BLABLA ORDER BY Rank ASC
Ranking: Using Rank
Projects in board: The projects in this board cannot be listed because of the complexity of the board filter
Any ideas?