ERROR: Could not add TV accessory

[PrimaryInc]

Hi,

Thanks for creating plugin. I get the error Could not add TV accessory after config and I dont know why.

I get the Volume Control and a input switch, but only Volume control works. Input swith times out with not responding.
Receiver Denon AVR-X7200W

Simple config as of now, only added via web UI:
{
"debugToInfo": false,
"devices": [
{
"name": "Denon Receiver",
"ip": "10.0.x.x",
"zone": 1,
"switchInfoMenu": true,
"defaultInputID": "MPLAY",
"inputs": [
{
"defaultVolume": 40
},
{
"inputID": "SPOTIFY",
"name": "Spotify",
"defaultVolume": 42
}
]
}
],
"switches": [
{
"name": "Denon Receiver Input",
"ip": "10.0.x.x",
"zone": 1,
"pollAllInput": true,
"defaultVolume": 40
}
],
"volumeControl": [
{
"name": "Receiver volume",
"ip": "10.0.x.x",
"zone": 1,
"volumeAsFan": false,
"volumeLimit": 70
}
],
"platform": "DenonAVR"
},

Note!! I verified that my receiver uses port 80.