The installation of the Link Advanced does not succeed, you are blocked, because it seems already installed.
1. My Link is already associatet to my account but on another site.
You have to verify if the Link is not present on another site. From the home page of the Somfy Protect app click on the arrow at the top. You can select all sites linked to your account from this menu.
Delete the useless site to keep only the site with your Link, then continue your installation.
2. I have got several e-mail adress and I am not using the right one.
You are not connected to the right account on the Somfy Protect app and your are trying to install your equipments. The Link is already installed, that is why you encounter this message.
3. You encounter this message at your first installation.
Your Link Advanced is new and you try to install it but you encounter this message. Contact your after-sale service.