Unable to get profile.

[YasuakiOmokawa]

Hello, all.

Please help me.
I use Garb::Management::Profile.all.detect and error happend to below:

MultiJson::AdapterError (Did not recognize your adapter specification (193: %1 は有効な Win32 アプリケーションではありません。 - C:/Ruby200/lib/ruby/gems/2.0.0/gems/json-1.8.1/lib/json/ext/parser.so).):
app/services/analytics_service.rb:26:in load_profile' app/controllers/users_controller.rb:13:inshow'

my environment is:
OS: windows 7 home premium 64bit
Ruby 2.0.0 64bit

load profile is defined below source:

require 'rubygems'
require 'garb'
require 'uri'
require 'active_support/time'
require 'yaml'

class AnalyticsService
  def self.load_profile
    #設定読み込み
    f = File.open(File.join(Rails.root, 'app','services','conf.yml'))
    conf_str = f.read
    myconf = YAML.load(conf_str)

    #先月の初め
    # start_date = (1.month.ago Time.now).beginning_of_month
    #先月の終わり
    # end_date = (1.month.ago Time.now).end_of_month

    # セッションログイン
    Garb::Session.login(
        myconf['ga']['google_id'],
        myconf['ga']['google_pw']
    )

    # プロファイル情報の取得
      profile = Garb::Management::Profile.all.detect { |p|
        p.web_property_id == myconf['ga']['property_id']
        p.id == myconf['ga']['profile_id']
      }
  end

  # 指標とディメンションをGarb::Modelをextendしたクラスに定義
  # class PageTitle
  #     extend Garb::Model
  #     metrics :pageviews
  #     dimensions :date
  # end

  # cond = {
  #     :start_date => start_date,
  #     :end_date   => end_date,
  #     # :filters    => { :page_path.contains => '^/items/' }
  # }

  # rs = PageTitle.results(profile, cond)
  # p rs
  # rs.each do |r|
  #     puts r.pageviews # ページビュー
  # end
end

called load_profile method below source(controller)

class UsersController < ApplicationController
  before_action :signed_in_user, only: [:index, :edit, :update, :destroy]
  before_action :correct_user,   only: [:edit, :update]
  before_action :admin_user,      only: :destroy


  def index
    @users = User.paginate(page: params[:page])
  end

  def show
    @user = User.find(params[:id])
    ga_profile = AnalyticsService.load_profile
    cond = {
        :start_date => '2012-12-05',
        :end_date   => '2013-01-05',
        # :filters    => { :page_path.contains => '^/items/' }
    }
      @data = AnalyticsServiceClass::PageTitle.results(ga_profile, cond)
  end

  def new
    @user = User.new
  end

  def create
    @user = User.new(user_params)
    if @user.save
      sign_in @user
      flash[:success] = "Welcome to the Sample App!"
      redirect_to @user
    else
      render 'new'
    end
  end

  def edit
  end

def update
    if @user.update_attributes(user_params)
      flash[:success] = "Profile updated"
      redirect_to @user
    else
      render 'edit'
    end
end

def destroy
    User.find(params[:id]).destroy
    flash[:success] = "User destroyed."
    redirect_to users_url
end

  private

    def user_params
      params.require(:user).permit(:name, :email, :password,
                                   :password_confirmation)
    end

    # Before actions

    def signed_in_user
      unless signed_in?
        store_location
        redirect_to signin_url, notice: "Please sign in."
      end
    end

    def correct_user
      @user = User.find(params[:id])
      redirect_to(root_path) unless current_user?(@user)
    end

    def admin_user
      redirect_to(root_path) unless current_user.admin?
    end
end

gemfile is below:

source 'https://rubygems.org'
ruby '2.0.0'
#ruby-gemset=railstutorial_rails_4_0

gem 'rails', '4.0.5'
gem 'pg', '0.15.1'
gem 'bootstrap-sass', '2.3.2.0'
gem 'sprockets', '2.11.0'
gem 'bcrypt-ruby', '3.1.2'
gem 'faker', '1.1.2'
gem 'will_paginate', '3.0.4'
gem 'bootstrap-will_paginate', '0.0.9'
gem 'garb'

group :development, :test do
  gem 'rspec-rails', '2.13.1'
  gem 'guard-rspec', '2.5.0'
  gem 'spork-rails', '4.0.0'
  gem 'guard-spork', '1.5.0'
  gem 'childprocess', '0.3.6'
end

group :test do
  gem 'selenium-webdriver', '2.35.1'
  gem 'capybara', '2.1.0'
  gem 'factory_girl_rails', '4.2.1'
end

gem 'sass-rails', '4.0.2'
gem 'uglifier', '2.1.1'
gem 'coffee-rails', '4.0.1'
gem 'jquery-rails', '3.0.4'
gem 'turbolinks', '1.1.1'
gem 'jbuilder', '1.0.2'

group :doc do
  gem 'sdoc', '0.3.20', require: false
end

group :production do
  gem 'rails_12factor', '0.0.2'
end

[Sija]

Try adding gem 'json' to your Gemfile