Error in solidus login users in dashboard

[sechix]

In dashboard of last master alchemy version I get this error,

I was researching and its due to '@online_users' is nil . I guess that because of I log with solidus and I have connecting login to solidus login I get the error.

  def index
    @last_edited_pages = Page.all_last_edited_from(current_alchemy_user)
    @all_locked_pages = Page.locked
    if Alchemy.user_class.respond_to?(:logged_in)
      @online_users = Alchemy.user_class.logged_in.to_a - [current_alchemy_user]
    end
    if current_alchemy_user.respond_to?(:sign_in_count) && current_alchemy_user.respond_to?(:last_sign_in_at)
      @last_sign_at = current_alchemy_user.last_sign_in_at
      @first_time = current_alchemy_user.sign_in_count == 1 && @last_sign_at.nil?
    end
    @sites = Site.all
  end

[tvdeyen]

Fixed by #1469