The problem is that you have only given the user permissions on the .kibana index. They must also have read permissions on any indicies that contain data they need access to. I recommend...
- creating a new role, e.g.
elb_ro - give this role read permissions to the the indicies where the data is located.
- add the
elb_rorole to any users that will be using these dashboards. NOTE: users can have multiple roles.