Adding Smart button blocked

Why can't I add an new Smart button to my hub. Add will show the button but when I want to finish I get the message that the device is not authorised to been added. 

Ths  button is new and I have several already in my home systeem. So why on earth is Calex blocking these devices. I want to decide if a device is save and so i want to turn off this very unwelcome setting. The question is how and where I can turn this off so I can add one of these new buttons. I tried several new buttons and all give the same message.