Empty Controller[%e3%80%90%e5%b9%b2%e8%b4%a7%e3%80%91%e5%b7%a5%e5%95%86%e4%b8%9a%e5%ae%89%e8%a3%85%e5%85%89%e4%bc%8f%e7%94%b5%e7%ab%99%e6%b3%a8%e6%84%8f%e7%82%b9%e6%b1%87%e6%80%bb] index