Actually, I checked and you have indeed entered it as your lightning address. But do you actually have an Alby account or did you use the same username provided by Primal but changed the ending to alby? 

 Can you test it now please? I'd not entered my npub in Alby hub 

 You can put your npub in getalby.com Account (to set up Nostr identifier nip-05) and your nsec in the Extension, to use Nostr on desktop