I have just upgraded my MacBook Air M4 to the latest MacOS 15.4 and My Kontrol S8 has stopped working. I can choose tracks but they will not play and none of the controls work either.
Latest macOS is 15.5. You granted Traktor Pro access to network and microphones in system settings?
Keep in mind that M4 Macs aren‘t officially supported in Traktor yet. Despite that it usually works but issues are possible.