In order to copy a Hormann BS remote control to a SOLO, you need to have a SOLO BS:
https://www.1control.eu/ecommerce/it/1control-solo-bs.php
Please repeat the copying process following the instructions shown in the following video:
https://www.youtube.com/watch?v=YpbQaH1of08&ab_channel=1Control
Make sure that, during the copying process, when asked to be close to the garage, the gate/garage closes completely and wait for the signal light to turn off, only then proceed by pressing the confirmation button indicated in the app.
If you reach the "Functionality check" page, with the round "Open/Close" button, but pressing it does not open the gate/garage, you may need to perform a manual learning procedure.
This could be caused by an additional security measure present in the control unit; it is the same procedure used to add a new original remote control (SOLO is recognized as such).
On the following page you can find the procedures for the most common Hörmann control units:
https://1control.zendesk.com/hc/it/sections/360005183559
To repeat the copying, follow this guide:
https://1control.zendesk.com/hc/it/articles/6719139803794