Stem Separation Error

Hi, I searched for it on the web or on the forum but found nothing. I remember having it working previously (when I just tested it) but now I need it, Stem Separation consistently crashes. (tried different files, different import options, different stem separation options, different audio settings, tried render in place first…)

Cubase itself doesn’t crash, I only get a message “Stem Separation error.”

Anybody has the same issue?

I’m on Cubase 15.0.30, Mac Studio M1 Max 64GB Memory Ventura 13.7.8 OS.

I updated to tahoe 26.6.2 and updated my UR816C soundcards firmware, not sure if it’s related, but anyow, it works again.