We have a specific space that we can’t change permissions on - I have access to the permissions page and can edit them but when I click on “save changes” the button becomes gray and nothing happens, when I refresh the page the changes don’t apply. I am the confluence admin so it can’t be a permissions problem..
The only thing I can think of that would cause this is the fact that the space contains a large number of users with access to it, so maybe there is a limit on the number of permissions you can give to a space?