TypeError: Cannot read property '0' of undefined

[Buadhai]

I just installed this yesterday. I worked fine. But, when I got up this morning I get the following error message:

TypeError: Cannot read property '0' of undefined
    at Server._createAccessory (/usr/local/lib/node_modules/homebridge/lib/server.js:390:17)
    at Server._loadAccessories (/usr/local/lib/node_modules/homebridge/lib/server.js:276:26)
    at Server.run (/usr/local/lib/node_modules/homebridge/lib/server.js:86:38)
    at module.exports (/usr/local/lib/node_modules/homebridge/lib/cli.js:40:10)
    at Object.<anonymous> (/usr/local/lib/node_modules/homebridge/bin/homebridge:17:22)
    at Module._compile (module.js:635:30)
    at Object.Module._extensions..js (module.js:646:10)
    at Module.load (module.js:554:32)
    at tryModuleLoad (module.js:497:12)
    at Function.Module._load (module.js:489:3)
/usr/local/lib/node_modules/homebridge/lib/server.js:390
  if (!(services[0] instanceof Service)) {
                       ^

Here's my configuration file:

{
    "bridge": {
        "name": "Koratbridge",
        "username": "CC:22:3D:E3:CE:30",
        "port": 51826,
        "pin": "031-45-154"
    },


    "description": "Homebridge config file",

    "accessories": [
        {
            "accessory": "Http",
			"name": "Water Pump",
			"switchHandling": "realtime",
			"http_method": "GET",
			"on_url":      "http://192.168.0.55/cgi-bin/relaynew.cgi?on",
			"off_url":     "http://192.168.0.55/cgi-bin/relaynew.cgi?off",
			"status_url":  "http://192.168.0.55/cgi-bin/relaynew.cgi?state",
			"service": "Pump",
			"brightnessHandling": "no",
			"sendimmediately": "",
			"username" : "",
			"password" : ""
	  }
    ]
}

[Buadhai]

I should note that the device and cgi urls are working fine:

MrMuscle:.homebridge mnewman$ curl http://192.168.0.55/cgi-bin/relaynew.cgi?state
0
MrMuscle:.homebridge mnewman$ curl http://192.168.0.55/cgi-bin/relaynew.cgi?on
OK
MrMuscle:.homebridge mnewman$ curl http://192.168.0.55/cgi-bin/relaynew.cgi?state
1
MrMuscle:.homebridge mnewman$ curl http://192.168.0.55/cgi-bin/relaynew.cgi?off
OK
MrMuscle:.homebridge mnewman$ curl http://192.168.0.55/cgi-bin/relaynew.cgi?state
0

[Buadhai]

I solved this by changing:

"service": "Pump",

to:

"service": "Light",

I also tried

"service": "Outlet",

But that didn't work.