Prepare accessory error: Prepare accessory not possible

I couldn't find any information about this in the wiki or via google.

I've installed Homebridge on my Synology NAS, then installed this plugin. Went to the settings for the plugins, added my TV there (with the IP address and Mac from the TV's Settings) Other than the name, ip and Mac I only checked the box "Load default inputs from device" Then I restarted Homebridge as per the green alert box.

Next I enabled the plugin to run as a child bridge, restarted homebridge again.

Finally I scanned the QR code of the plugin, to add the bridge to my "Home" app.

Nothing appeared, so I checked the logs from Homebridge, and found this error: [11/12/2023, 8:56:46 PM] [homebridge-lgwebos-tv] Device: 192.168.178.28 LG G3 OLED, Prepare accessory error: Prepare accessory not possible, pairing key: 0..

This is the full log from the last start to showing the error for the first time: (with addresses changed)

[11/12/2023, 8:54:41 PM] [HB Supervisor] Started Homebridge v1.7.0 with PID: 18284
[11/12/2023, 8:54:41 PM] Loaded config.json with 0 accessories and 2 platforms.
[11/12/2023, 8:54:41 PM] Loaded 0 cached accessories from cachedAccessories.
[11/12/2023, 8:54:41 PM] ---
[11/12/2023, 8:54:42 PM] Loaded plugin: homebridge-lgwebos-tv@2.14.0
[11/12/2023, 8:54:42 PM] Registering platform 'homebridge-lgwebos-tv.LgWebOsTv'
[11/12/2023, 8:54:42 PM] ---
[11/12/2023, 8:54:42 PM] Loading 2 platforms...
[11/12/2023, 8:54:42 PM] [LgWebOsTv] Initializing LgWebOsTv platform...
[11/12/2023, 8:54:42 PM] [LgWebOsTv] Initializing child bridge 01:23:45:67:89:AB
Setup Payload:
X-HM://0024DWNZ4VLN4
Enter this code with your HomeKit app on your iOS device to pair with Homebridge:

    ┌────────────┐     
    │ 553-85-696 │     
    └────────────┘     

[11/12/2023, 8:54:42 PM] Homebridge v1.7.0 (HAP v0.11.1) (Homebridge 8A5A) is running on port 51683.
Failed to create listener for avahi-daemon server state. The system will not be notified about restarts of avahi-daemon and will therefore stay undiscoverable in those instances. Error message: Error: No such interface found
[11/12/2023, 8:54:42 PM] [homebridge-lgwebos-tv] Launched child bridge with PID 18318
[11/12/2023, 8:54:42 PM] Registering platform 'homebridge-lgwebos-tv.LgWebOsTv'
[11/12/2023, 8:54:42 PM] [homebridge-lgwebos-tv] Loaded homebridge-lgwebos-tv v2.14.0 child bridge successfully
[11/12/2023, 8:54:42 PM] Homebridge v1.7.0 (HAP v0.11.1) (homebridge-lgwebos-tv) is running on port 53031.
Failed to create listener for avahi-daemon server state. The system will not be notified about restarts of avahi-daemon and will therefore stay undiscoverable in those instances. Error message: Error: No such interface found
WARNING couldn't map socket coming from remote address ::ffff:000.111.222.333:55790     at local address ::ffff: 000.111.222.333 to a interface!
WARNING couldn't map socket coming from remote address ::ffff: 000.111.222.333:55794     at local address ::ffff: 000.111.222.333 to an interface!
WARNING couldn't map socket coming from remote address ::ffff: 000.111.222.333:40304     at local address ::ffff: 000.111.222.333 to a interface!
WARNING couldn't map socket coming from remote address ::ffff: 000.111.222.333:40308     at local address ::ffff: 000.111.222.333 to a interface!
[11/12/2023, 8:54:52 PM] [homebridge-lgwebos-tv] Device: 192.168.178.28 LG G3 OLED, Prepare accessory error: Prepare accessory not possible, pairing key: 0..

merdok / homebridge-webos-tv

Prepare accessory error: Prepare accessory not possible #502