We don’t have a MiniLab to try out, but after poking around the internet, it looks like the MiniLab has had problems connecting to Linux-based systems (the Organelle is one) for a while.
In the Jan 27 2016 post on this forum: https://linuxmusicians.com/viewtopic.php?f=6&t=11663
the poster suggests that the MiniLab must be in “absolute mode” as opposed to “relative mode”. The first is selected by pressing Shift + 1 after the keyboard is connected to your computer.
What MiniLab firmware version do you have? You may also have to update that: https://www.arturia.com/faq/utilization/minilab-firmware_update_old_mcc
@JohnnyEgo could you tell us the MiniLab firmware version you have?