NoMethodError: undefined method `name' for nil:NilClass

https://sentry.gitlab.net/gitlab/gitlabcom/issues/811906/

NoMethodError: undefined method `name' for nil:NilClass
  profiles/groups_controller.rb:11:in `update'
    flash[:notice] = "Notification settings for #{group.name} saved"
  action_controller/metal/basic_implicit_render.rb:4:in `send_action'
    super.tap { default_render unless performed? }
  abstract_controller/base.rb:186:in `process_action'
    send_action(method_name, *args)
  action_controller/metal/rendering.rb:30:in `process_action'
    super
  abstract_controller/callbacks.rb:20:in `block in process_action'
    super
...
(113 additional frame(s) were not displayed)

NoMethodError: undefined method `name' for nil:NilClass