Alba,
Sorry I missed that you did not have the proxy rule for route in your config.json
and my app config.json proxy:
"httpProxy": {
"useProxy": true,
"alwaysUseProxy": false,
"url": "/DotNet/proxy.ashx",
"rules": [
{ "urlPrefix": "http://albavoli.maps.arcgis.com/", "proxyUrl": "/DotNet/proxy.ashx" },
{ "urlPrefix": "http://route.arcgis.com/", "proxyUrl": "/DotNet/proxy.ashx" },
{ "urlPrefix": "http://traffic.arcgis.com/", "proxyUrl": "/DotNet/proxy.ashx" }
]
}