The problem seems to be the Martin Atomic in 14 Ch mode. When you try to turn on the LED level in Capture by hand, you get the error message.

Do you still encounter this issue with Capture 2021.0.34 release?

Hello,

i had teh problem again after loading the sample project "Theatre"

I´ve tested Atomic LED, Astera Hyperion Stick..... all the same problem

by the way. latest software release