Cannot read property 'payload' of undefined
**Describe The Bug:**

Upon updating to v5.0 and re-arranging config, the payload property cannot be read.

**To Reproduce:**

Update to v5.0 and check logs. In Home app, devices are moved to Default Room and not responding.

**Logs:**

[Meross] MSL-120 - Failed to refresh status of Bedroom Lamp: "Cannot read property 'payload' of undefined" undefined

# **Environment:**

- **Node.js Version**: v14.16.0
- **NPM Version**: v6.14.11
- **Homebridge Version**: v1.3.3
- **Homebridge Meross Plugin Version**: v5.0
- **Homebridge Config UI X Plugin Version**: v4.40.0
- **Operating System**: Docker Alpine Linux (v3.12.4)
