Cannot get audio detection to work

Hi! I am doing everything exactly like in the video tutorial/manual but audio detection doesn’t seem to work when I feed the audio in Scaler Audio 2. The same happens if I use Scaler 2 on a midi track and choose an audio track as a source. It works fine if I drag a WAV into it.

I use Ableton 10.1.30, mac OS 10,14.6 and Scaler 2.12. The video is here:

Thank you for your suggestions!