Somfy RTS blinds Smart Things


I’m new to Smart Things. I just bought a Aeotec hub to control my Somfy RTS blinds as a first step. The hub is supposed to work with Somfy but I cannot get the hub to add. It says “…in order to pair the device it has to be configured in the Somfy Set&Go app first”. What does it mean?

Any help will be much appreciated thanks!