Seems that platform is crashing home bridge
I've had my webOS TV set up as an accessory for ages, and it has been working fine.

{
            "name": "TV",
            "ip": "192.168.1.28",
            "mac": "38:8C:50:12:9E:42",
            "prefsDir": "~/.webosTv",
            "pollingInterval": 5,
            "legacyTvService": false,
            "showInputButtons": false,
            "volumeControl": "false",
            "volumeLimit": 100,
            "channelControl": false,
            "mediaControl": false,
            "soundOutputButtons": [
                "external_arc",
                "tv_speaker"
            ],
            "inputs": [
                {
                    "appId": "com.webos.app.hdmi2",
                    "name": "Amplifier"
                },
                {
                    "appId": "com.webos.app.miracast",
                    "name": "Screen Share"
                }
            ],
            "remoteControlButtons": [
                "com.webos.service.tv.display/set3DOn"
            ],
            "remoteSequenceButtons": [
                {
                    "sequence": [],
                    "interval": 500
                }
            ],
            "accessory": "webostv"
        }

But when I set up as a platform, it just crashes homebridge

 {
            "devices": [
                {
                    "name": "TV",
                    "ip": "192.168.1.28",
                    "mac": "38:8C:50:12:9E:42",
                    "prefsDir": "~/.webosTv",
                    "pollingInterval": 5,
                    "legacyTvService": false,
                    "showInputButtons": true,
                    "volumeControl": "true",
                    "volumeLimit": 100,
                    "channelControl": false,
                    "mediaControl": false,
                    "inputs": [
                        {
                            "appId": "com.webos.app.hdmi2",
                            "name": "amplifier"
                        },
                        {
                            "appId": "Share Screen",
                            "name": "com.webos.app.miracast"
                        }
                    ],
                    "remoteSequenceButtons": [
                        {
                            "sequence": []
                        }
                    ],
                    "infoButtonAction": "INFO"
                }
            ],
            "platform": "webostv"
        }

I used the Config-Ui-X to set it up as a platform

Homebridge V1.0.4
WebosTV Plugin 1.7.1