Spitfire Audio - Labs item missing

We have one item from Spitfire Labs, Choir, installed and managed to show this in Ardour. We wanted to do the same for the other item from Spitfire Labs, namely the Autograph Grand. However, we did not succeed to get this visible in Ardour. See pictures which explain the situation.

What did we wrong?

By the way, we use Ardour 8.4 on Tuxedo_OS (Ubuntu like OS, with KDE Plasma), using yabridge.

Spitfire Audio - Labs