@Solla-topee I'm scared to share information I shouldn't share, so I'm not sending a photo for the moment. The model of the router is "Livebox 5" from the French operator "Orange", tell me if you...

@Solla-topee Thanks for your fast answer, I can't show you any error message, the product crashes (it deconnects from the pc) and tries to reconnect to the same wifi and then crashes again, it is...

I tried every tips you posted (https://community.tp-link.com/en/home/forum/topic/217836) but I still can't connect to 5Ghz. 1. At first I couldn't even see the 5GHz version, I switch from canal 100...