fix error

app/controllers/admin/box_controller.rb

@@ -3,7 +3,7 @@ class Admin::BoxController < OrbitAdminController
   SocketFile = "#{Rails.root}/tmp/box.sock"
   Binary = File.expand_path("../../../../bin/box", __FILE__)
   CSSFile = File.expand_path("../../../../white-on-black.css", __FILE__)
-  skip_before_filter :verify_authenticity_token
+  skip_before_action :verify_authenticity_token
 
   def index
     is_not_open = `fuser #{SocketFile}`.gsub(/\n/, '').empty?