Cannot GET /examples/proximity-hcsr04/(%E3%83%87%E3%82%B8%E3%82%BF%E3%83%AB%E5%85%A5%E5%8A%9B%E7%AB%AF%E5%AD%90%E4%BD%BF%E7%94%A8%E3%81%AE%E5%A0%B4%E5%90%88