TypeError: Cannot read property 'type' of undefined
**Describe the bug**
I´m getting the following error messages;

[20/08/2021, 12:14:58] [FritzPlatform] An error occurred during polling extras!
[20/08/2021, 12:14:58] [FritzPlatform] TypeError: Cannot read property 'type' of undefined
    at /usr/local/lib/node_modules/homebridge-fritz-platform/src/accessories/extras/extras.handler.js:761:91
    at Array.filter (<anonymous>)
    at Handler.poll (/usr/local/lib/node_modules/homebridge-fritz-platform/src/accessories/extras/extras.handler.js:761:44)
    at Timeout._onTimeout (/usr/local/lib/node_modules/homebridge-fritz-platform/src/accessories/extras/extras.handler.js:776:29)
    at listOnTimeout (internal/timers.js:557:17)
    at processTimers (internal/timers.js:500:7)
[20/08/2021, 12:14:59] [FritzPlatform] An error occurred during polling router/characteristics!
[20/08/2021, 12:14:59] [FritzPlatform] TypeError: Cannot read property 'type' of undefined
    at /usr/local/lib/node_modules/homebridge-fritz-platform/src/accessories/router/router.handler.js:963:91
    at Array.filter (<anonymous>)
    at Handler.poll (/usr/local/lib/node_modules/homebridge-fritz-platform/src/accessories/router/router.handler.js:963:44)
    at Timeout._onTimeout (/usr/local/lib/node_modules/homebridge-fritz-platform/src/accessories/router/router.handler.js:1003:29)
    at listOnTimeout (internal/timers.js:557:17)
    at processTimers (internal/timers.js:500:7)


**To Reproduce**
I installed homebridge with the Raspberry Pi Imager 1.6 according this installation:
https://github.com/homebridge/homebridge-raspbian-image/wiki/Getting-Started

Afterwards I installed your plugin via plugins-page on the config-page and did the configuration via plugin settings link.


**Desktop (please complete the following information):**
System Information
OS			Raspbian GNU/Linux Buster (10)
Hostname	homebridge
IPv4 (eth0) 	192.168.20.240
IPv6 (eth0) 	fe80::4d6d:463c:a2e5:9989
Node.js Version	v14.17.4
Npm Version	v7.20.3
User			pi
Storage Path	/var/lib/homebridge
Config Path	/var/lib/homebridge/config.json
Service Mode	Yes

**CONFIG**
{
    "bridge": {
        "name": "Homebridge B5CB",
        "username": "0E:32:E8:93:B5:CB",
        "port": 51392,
        "pin": "220-78-652"
    },
    "accessories": [],
    "platforms": [
        {
            "name": "Config",
            "port": 8581,
            "platform": "config"
        },
        {
            "name": "FritzPlatform",
            "debug": true,
            "devices": [
                {
                    "active": true,
                    "name": "DocBox",
                    "host": "192.168.20.1",
                    "port": 49000,
                    "username": "Homebridge",
                    "password": "*************",
                    "manufacturer": "Fritz Box",
                    "model": "7590",
                    "serialNumber": "12345",
                    "master": true,
                    "ssl": true,
                    "tr064": true,
                    "igd": false,
                    "readOnly": false,
                    "hide": true,
                    "connection": "dsl",
                    "wifiUnits": 2,
                    "options": {
                        "wifi_2ghz": "switch",
                        "wifi_5ghz": "switch",
                        "wifi_guest": "switch",
                        "wps": "characteristic",
                        "led": "switch",
                        "dect": "switch",
                        "broadband": "characteristic"
                    }
                }
            ],
            "options": {
                "polling": {
                    "timer": 15,
                    "timerSmarthomeButtons": 5,
                    "exclude": []
                }
            },
            "telegram": {
                "active": true,
                "token": "*****",
                "chatID": "****",
                "messages": {
                    "presence": {
                        "user_in": "Welcome at home @",
                        "user_out": "Bye Bye @",
                        "anyone_in": "Someone is at home!",
                        "anyone_out": "Nobody at home!"
                    },
                    "callmonitor": {
                        "incoming": "Incoming call from @",
                        "outgoing": "Outgoing call to @",
                        "disconnected": "Call with @ disconnected"
                    },
                    "alarm": {
                        "activated": "Alarm activated",
                        "deactivated": "Alarm deactivated"
                    },
                    "reboot": {
                        "start": "@: Offline!",
                        "finish": "@: Online!"
                    },
                    "network": {
                        "on": "@ is in network!",
                        "off": "@ not in network!"
                    },
                    "outlet": {
                        "started": "@ started!",
                        "finished": "@ finished!"
                    }
                }
            },
            "platform": "FritzPlatform"
        }
    ]
}