You have to have project admin rights across all the projects included in the board. Is that what you're missing?
I guess this is indeed what is missing, but the board was created for one group and it asks for another group permission. How can I restrain the scrum board to be only for my group?
You don't. Boards have nothing to do with groups, they're based on drawing information from projects. If your board includes 6 projects and you're only an admin on 5 of them, you need to either drop project 6 from the board filter, or get yourself admin rights to it.
It looks like you're new here. Sign in or register to get started.