LGTV Binding ERROR "Cannot find connection details for device id 'LGTV1'"

Hi all,
I’m really new on OpenHab.
For now, I just add a few bindings, things items and globally manage to get what I want. (simple tasks)

I have a problem with my LGTV. I installed the binding “binding-lgtv1 - 1.12.0”
I created the service file. I created items and added it to the Basic UI.

Now I have 2 switches :

  • Power Off
  • Mute ON/OFF.

The first time I clicked, I get the pair key and added it to the service file.

Now, when I click a switch, I get this error :
[ERROR] [ab.binding.lgtv.internal.LgtvBinding] - cannot find device LGTV1
[WARN ] [ab.binding.lgtv.internal.LgtvBinding] - Cannot find connection details for device id ‘LGTV1’

I don’t understand this error. I had the pair key on screen, I think that mean that the connexion is OK. So why can’t it find the device ?

Can you help me ?

Thanks a lot !